Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1ea6cc0ef22ede…

MALICIOUS

PDF

83.7 KB Created: 2021-08-18 13:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ccae8d27f957870a0a91e331db5046c1 SHA-1: d16d2fcf540ee2a02f618b24b6d7497f8316233d SHA-256: aa1ea6cc0ef22edecb59592261930fff9b0e54ddee150cab9a803cb87fcef2f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, with a high ML classifier score. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://allytemp.ru/uplcv?utm_term=download+aoe+1+net+hoa+binh PDF link annotation
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dea524b084---31549461807.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/9449947105.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ec972afdfbab66b517926f319bebd020/35830592718.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/71780547115.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/zolaverota.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/23c246b41172aee8176c1a476af3c8f7/54025735511.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/3438e32328afb67bd2fc8ff3651d801b/25353446982.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/511dc6369b6f9375d8ca6510f175f4a4/52096860388.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b88cea562f4---43510147701.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0954df76c---81087247263.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/77016906874.pdfIn PDF document text
    • http://pratiklinik.com/img/userfiles/files/bojexivopifosotujapisokel.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16106c632bed07---jefadolokejuzevekosutet.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/64561933553.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/3848375039.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/bfe3b2eb75f5fad28653623336930a3f/mifujub.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/92890794826.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210727180307.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/piwarabijisenifogezidi.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/44b190e06c4ebf2189208bdd002e3f85/24049723663.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/a9db53432b1153d89fa8858d60247ce5/tebediwekidovi.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecba15d942---59032792559.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/jinif.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/14bfvr7lug8etmh82hh9v6kbt5/vetetojatezegabutit.pdfIn PDF document text
    • 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_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC26 30516 bytes
SHA-256: bddbe6240312f6dc18dc078aaa2f1e0671326c34c0f19e1bbb5f59bfbbf241b9
font_02_sfnt_off00012845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12845 10356 bytes
SHA-256: 1e9c37f7721e5ca5e63ed65e76cd3b29d00563e41324e09ab9819a30de2ece06

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