Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1a54602e144e6c…

MALICIOUS

PDF

85.8 KB Created: 2021-06-26 23:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 047de0639f2d0f9c25f1ae27bfc41f92 SHA-1: 9f301a54e77cee0f22d7f48f44b71b9f05874de7 SHA-256: 6e1a54602e144e6cd9e97cbee11dba9a9ce94e3a857153e4286ecca7197722ce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised CMS platforms or disposable domains. The presence of these links suggests the document is designed to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • 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://wastran.ru/uplcv?utm_term=liquid+allowed+in+carry+on
    • http://fouladsazanco.com/Upload/file/34487829533.pdf
    • https://erdemlerkoleji.com/resimler/files/73687182231.pdf
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/24723418536.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d5d0237eb---50267320234.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/414357e2e5178bf4d4605ed9a5fd7cd8/fuzexavagasowo.pdf
    • http://alburigiott.it/userfiles/files/23429920002.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160868fdd1dbd1---kolewifatikelozugu.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7cf7c8321---46674243241.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/dc88a7e2ff8ef5722f1dfdc69a87ef4f/9792085010.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/bb2d1b80f3fbfd98a148cda832b50852/95316144666.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/10198816b90d6ae8536fb228de877a9a/dopakuditafogafiteteve.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071104b9ac70---vokamiredukoto.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/3c224fbgfnitr1d1chb1nvq15e/7898973585.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093faaa34f25---gofodomoz.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766cd46acb3---zakogovedaxirewejax.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16096aeca81167---64937536557.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/pjce1gt5mup4qhh9i8933at5j7/bizazugir.pdf
    • http://humanitool.ru/userfiles/file/luluwiraremozanifiroxupal.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/842c18c3c6b844a88cab7f8bd5596f61/70511076893.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/2ab198fce691abbcfd1bec33ea3f351f/82307003989.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/asgs2ks6es032u62cm1ppdv0ed/4910509002.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/gitfb1ev5onahe33c5dh29o9pb/wizagojefokatigetefajumaj.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a08da6c7f05---21427538017.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4c0dac42f---37963195834.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_off0000eb60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB60 16792 bytes
font_01_sfnt_off00010372.bin
d47819752e8ba87d840ac778f5926649c0f90fd760c60569a20ec616bfb4aa3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10372 18000 bytes
font_02_sfnt_off000131ff.bin
d2f58f821ca1a5b0bdfa51ddcfa8be6ba3d852d50193dd5761a146364e365d8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x131FF 10500 bytes