Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d6ec7856ae975f…

MALICIOUS

PDF

215.5 KB Created: 2021-06-25 14:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a985f396a5b6f2c8f49b457300d4355b SHA-1: e3953d8da79b922bb17cfaf558402a4f330fd968 SHA-256: 72d6ec7856ae975f91b8c26fa98656a06b15c1473280349b09098b2e1e3a6356
174 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including an ML classifier and ClamAV. The heuristics indicate it uses an advance-fee scam lure, presenting the user with a fake lottery or parcel delivery scenario to encourage clicking embedded links. The embedded URLs, such as https://crewmak.ru/uplcv?utm_term=toco+contraction+monitor, likely lead to the download of a second-stage payload. The document's structure and embedded links suggest it is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crewmak.ru/uplcv?utm_term=toco+contraction+monitor
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/dcdc126bc2926d628c35ae4d66fad9a4/mififepirexegilimolik.pdf
    • http://scoutpate.com/userfiles/file/62884138526.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/7cf9413338f8e3ca68f4443f61e2a4d0/58435176005.pdf
    • http://erdivigado.hu/userkepek/file/baxeziv.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/0b461818e1f9c9633f523ea98d44640e/67422326931.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/441f82f2b3b2c22b3b567906ddb8d4c5/83469433899.pdf
    • http://precedent.by/_newsite/images_from_html_editor/file/tixuximawewika.pdf
    • https://kompaspt1.com/contents//files/nadizopofodukuka.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/8njekol6fgpijh1fo0v3tj20gt/setamunu.pdf
    • http://serramentisiciliano.it/userfiles/files/99854685539.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc98b4bbc7---76033385169.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36d10af150---momewonavinipab.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/02ac232c9bc17a14b1afb479b45c922d/zatexefuxid.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/2e97dda401af40d59f80f5ddbdac1985/50602825199.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ejfdlrs5os2ulsqqdno86eti2k/fevetezoxepib.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160781518a71c9---momakefikeselix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f0fa.bin
84f26618f54f894499b22637ebc20524c9c305b442a2c0990a07095f96bdd153		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0FA 18704 bytes
font_01_sfnt_off000322a4.bin
6f9d14996b85cfa87153425fe11c787490dd590658756ea1d878a4db953f3a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x322A4 10008 bytes
font_02_sfnt_off000338d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x338D1 16792 bytes

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