Malicious PDF — malware analysis report

Static analysis result for SHA-256 222ed1217d3b1fd3…

MALICIOUS

PDF

79.0 KB Created: 2021-05-23 15:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 413ceed9b3f5632c86a746cfedb26d69 SHA-1: ea9b40aec67e91ccfcc9056460edb8ea14d7218e SHA-256: 222ed1217d3b1fd3038de3f29f9d91c88bb911e88cc9815d0517e51362c29335
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6870

Heuristics 5

  • 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
  • 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://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/b2820c61bef5cdb2dfb93433dd9ac551/33258822347.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/pr84hl9s7bmehokm53fsm2pb55/53410907688.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/adf9bded49831edb73a810be32231513/41763426031.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f680eb46b3---govenatif.pdf
    • http://altelaw.com/uploads/image/file/39917012921.pdf
    • https://emauto.lv/index/images/up/file/rimurewogesefewerixikusek.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072bbff7c6d3---44948427173.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/5a487e5d0766def3e6559d897bf806d4/wixovanulamisafi.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607727266f446---54021788804.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/84f4ded858b2cce9b22129f364baf35b/rasezuwitesoxiluxatozakot.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083ef23342dc---litafef.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d75a5391b---8946520936.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085c2eeda5c5---56241817520.pdf
    • https://paklya.su/design/img/upload/file/bakulukilibivipaxejad.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096092acc629---buwaxubuwokije.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=tabela+periodica+preto+e+branco+para+imprimir+pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/f67c69cc58bd13f1f93662a71c195d91/17327819681.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe41.bin
6153fd61bd3e608efddc51f9946d7054c9f64d78e8c6ef30f30f0ed88cbf2e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 5000 bytes
font_01_sfnt_off00010f21.bin
3755ebcd4f4578e39d3fdfde7656ae545c6bdb947272fe8fc3523ce5176febb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F21 13812 bytes

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