Malicious PDF — malware analysis report

Static analysis result for SHA-256 943df009a81f4cd2…

MALICIOUS

PDF

83.5 KB Created: 2021-08-18 18:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4e5b1cef5b775dcbefaf6efac79df365 SHA-1: a95a8c412736abe4c6ce0ffb782cbd6e32bd32a6 SHA-256: 943df009a81f4cd2b6eb5b1e3654900504f33414dd27ba61d6d7a7790bdf3878
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. The heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for malicious content. The document body is heavily obfuscated, preventing a clear understanding of its direct user-facing lure, but the overall pattern suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://crysiq.ru/uplcv?utm_term=cuanto+son+100+gr+de+azucar+en+cucharadas PDF link annotation
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/22f8ded857c63d041c8834f6212db6d5/limiterumidirepem.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae82991f05---ganolomurapemabujepu.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/cb33191fd160d9d2671732d8d589e5fe/98240630912.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/ftqg77337muhhlnv98nej9spn0/7247519271.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/duxus.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/71975766093.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/f63415b34e4c513266c008085fbf8caa/molono.pdfIn PDF document text
    • http://summithighschool1958.com/clients/71652/File/34464123051.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/dotatisopironazujed.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a3ce4aeeb---53876210460.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/wimovunusoxukugoxoromob.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/puserebowukomoxupuvux.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/u5009pp3dhkv9a2jme6snti7s4/74090680038.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/fc5b3dca651baed0b94bfb6b09eb5f65/34594833587.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/73542187755.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/siratev.pdfIn PDF document text
    • http://minipit.com/data/files/15346868928.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/lulebuvijuzinalilef.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/wanetefafa.pdfIn PDF document text
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/bagaziluloberapanirolurur.pdfIn PDF document text
    • http://www.asslar.de/downloads/1591071837.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2adad60dbd---59806524630.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_off0000dbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE9 18984 bytes
SHA-256: 3e12aaaf4e9fa8dbf065a8fdebb74800b74470b8785ce994d6b7c17e76101c5e
font_01_sfnt_off00010d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001254f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 10876 bytes
SHA-256: 6137d288ae1b48d654d59abb5478a25bba148a76ccd075b69405ce0a71358930

Open this report in the interactive analyzer, or submit your own file for analysis.