Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e7c428d35d8637…

MALICIOUS

PDF

165.2 KB Created: 2021-07-13 17:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4940394e5dee50f9f90b8624abb14d27 SHA-1: c7fa839dea9c0c71db2352a1f9a21b89b7933e68 SHA-256: e2e7c428d35d86370faea31cc3b44b6b26eff585f8466924dc956d7545acfe4f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external websites, many of which appear to be compromised WordPress installations hosting PDF files, suggesting a link farm designed to distribute malicious content or phish users. The document's structure and content align with common advance-fee fraud schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9229

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://archism.ru/uplcv?utm_term=inuit+tribe+culture
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c373b4129ba---75347011223.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/8aa2f4ce247fe58c844cb6dc38545ed8/2339433876.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606c733fe072c---woruz.pdf
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/boveziv.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/ef29fb02822f2d4063244b4757429158/27220241919.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b3e758522---30400840478.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/ff80e17cf325b2f14bfe324d2e0be02c/jitotifawaxuz.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8efc502b8---22801321039.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/3341d2bb2cf1dfc6aba9f53e5c8bb3b8/bilujanolilonepi.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/7149d3a9c841525e426b879a469d8928/pewila.pdf
    • http://ranjitabiswas.com/userfiles/files/sewebo.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3de94618e---pewapelomuxokijobexam.pdf
    • http://cdmvt.cz/sites/default/files/23876865216.pdf
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/40616112354.pdf
    • http://thaidicattery.com/clients/f/f7/f7b4890cfba443994123e46b8078d6bd/File/56778264196.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160de68841622d---wurijiginebada.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160870ae283893---47170858297.pdf
    • https://fnb-concepts.com/images/uploads/files/92072230290.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160be45d03ba6a---69822147853.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/uhmdq29me01v59gog7ic6i4ns2/novutonotewaso.pdf
    • http://ahchala.com/img/file/34871926550.pdf
    • http://yjsyrj.com/userfiles/file/62316892694.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/fb3db38a97abb95c0be7d924b9d98b83/ponemogusuxezalu.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd4683971---fetileburezutudurosupa.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/dd76040vvcgm8h05ktfg9ej8cl/xafatotaxeporaxakudalux.pdf
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6///20216141419433453.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020ecd.bin
e0793412032f2e6e6f3f554b823817990242dbdcd5c461fd699e9f8f1955fd6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20ECD 16432 bytes
font_01_sfnt_off00022593.bin
94b555c0bebb618db183e744ec7a82fe62fce984c1294f10833ddb45d1e2d0ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22593 19596 bytes
font_02_sfnt_off00025863.bin
dbbd807b4e910acb37680986e108fd38f2d523c61d3bccec037c9b7273b89f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25863 9964 bytes
font_03_sfnt_off00026e87.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26E87 16792 bytes

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