Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ade13c9233d7971…

MALICIOUS

PDF

90.3 KB Created: 2021-07-07 20:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: abc3ecce92a1a53cd330dda154d0ff37 SHA-1: 7463d8f6dc66daae11648af02dbeb3f8fe051b87 SHA-256: 2ade13c9233d79719d72e4795dbd26d1901368a7d02ae3a6348e498d4aa0e970
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a social-engineering tactic, specifically a 'Browser extension / update installation lure', to deceive users into downloading and installing potentially malicious software. The document contains numerous links to external resources, many hosted on compromised websites or disposable domains, suggesting an attempt to distribute a payload or redirect users to malicious sites. While no scripts were directly extracted, the nature of the lure and the presence of embedded URLs indicate a high likelihood of further malicious activity, such as downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gbagencement.fr/uploads/file/59267229484.pdf In PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/gezepowesenir.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d15d7dfa01---45543650478.pdfIn PDF document text
    • http://novichiha.ru/pic/file/vemebofamutuvemabi.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160861d6283ef3---subadujifovisa.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/e1qrastnkvs6bbrdpns6ddojg3/43004082961.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/j0jv0ra4gt3rj4ajp3c3j6epsa/73685090396.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/xipobesuwuxinik.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210626_145210.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608dde2b2d74e---13358348106.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/o7jel00me35p6t0tc9p4ltl9r6/gatinuxugimesivapa.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/1b99af7d1254580e3ca0db6f748bd7bc/75106718340.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/8ffo1lk77uhchh206f38j54a02/83869079290.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607197633491b---mugofuboxulatomibu.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7da2cc355d---18075065212.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d6abe5a12---tekogemujadiduze.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/29883269167.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/wesugorelalinitabutepaput.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700850c879c---wepesiloxabekadalureje.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/4c5ca7cm45g7kkflm0ee2aua1d/97162255172.pdfIn PDF document text
    • https://actorconseil.com/files/file/diwixivetusek.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c3e386ca2---berujisenibozumipomegu.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/91ae3d99a63025afbb3aeeebef76f307/mukawifen.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160debbaa258d1---7337969947.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/venudefopunud.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/nazatetamaroresim.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210617_AF9973218C5238BD.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+car+with+a+lion+logoPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 17724 bytes
SHA-256: 469637e7fdf2a424d0806d9c491e1cbd03894a1b78ef96d628d9b80ca3c9eb35
font_01_sfnt_off00012c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001441d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441D 10388 bytes
SHA-256: de3f8aca19c306355a05070be8a36adfa41284cc1460029bbc478849ad32788e

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