Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb02ab2aa5d8ffb8…

MALICIOUS

PDF

83.7 KB Created: 2021-09-08 06:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: e351751c771b36632ca8bb1b472323c6 SHA-1: db936dbe6c5fdd165f2c6ff0c3438b6428cee11c SHA-256: cb02ab2aa5d8ffb8ee2e2e16faaea03c79f024996c2613b404c412bfa026b593
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://marketingnews.fr/images/file/woparikajumewelalito.pdf In PDF document text
    • https://noithathoaphat11.com/upload/files/28966043103.pdfIn PDF document text
    • http://fedoro.ru/upload/file/takilenodozajotoxejuji.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/76672696767.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c21d3b6c9---43256908715.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/67992340398.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/wiralutoved.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/tli66rgop9ad1rch6c8gsjv0f4/vaxixadanadozajivu.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/zudipaludixegonan.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/guwiweb.pdfIn PDF document text
    • http://artside.org/data/temp/file/kipepezefurogogenotipe.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/25450158743.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072f34b7c021---mujasupet.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/0d6ef6f82fd50eff9776a9a147050aa9/farupuwut.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/2c27067eb38ce675d34b2d67a4204412/zazuze.pdfIn PDF document text
    • https://tepihtrava.rs//files/51184397475.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/19280666e0e4ad6f8a1281c6552cafcd/1766249292.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/tarisopasapivorarijonu.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/64218236130.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/d6814cfed254bda4ac0f8ab024c5cc06/bekelujutupexokosibutova.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/24407e22f823562c1f765b043631c95c/niwipomisadavuvatosifamez.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/55d1e8992a860171a6f2586800fd32f3/44299945712.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/56e2b5f189063e9208029038358178de/kositomigemutatomapa.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/wimetinifa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=konsep+biaya+dan+sistem+informasi+akuntansi+biaya+pdfPDF 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_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 11048 bytes
SHA-256: 1b5f52873572ee0fca2fac64e13b8c6f608750d0798aa0f6c519b8f987d83369
font_01_sfnt_off0000fdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF4 16272 bytes
SHA-256: e5a304a98152d9e99745dade69fce29de8df57150c1bc2ded19180bfde7189aa
font_02_sfnt_off0001285a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1