Malicious PDF — malware analysis report

Static analysis result for SHA-256 c065db97e85970b7…

MALICIOUS

PDF

79.5 KB Created: 2021-06-30 22:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed6e0e80ba6d3a4535ec82c7a2323456 SHA-1: b26d4ccc570317cd7ff4cef87e0a07ef78aba59a SHA-256: c065db97e85970b79acc6c73c407f17e970edca25f46dd8df2a5265c9d479667
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=ppt+syntax+linguistics
    • https://almondzwealth.com/administrator/imagetemp/file/71612301682.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9854239be---96632290916.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/2dd53d511580502a297ba6363517aafa/40773841164.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/09b502e0f2fefae1b6c98551471004d3/senapabezujokizozir.pdf
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/75689969231.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/bkbjk0e5sj46n4mjbqg2ki0oe7/sozolakaxirimu.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/3uict7v9kof7df976h30pqic67/lasurabasodirinitokexox.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/dmcmgo7tbj4lfcbq3b15ksuh73/pafuxuwujojixifakojarubem.pdf
    • http://meble-tk.pl/userfiles/file/98595143464.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608276543871f---70264154994.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/f3804c941aa7a32a9c8328041d97741a/99709527131.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aaff74b7297---wudekonolibugenebipola.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fde54d9cd3---vegopesugof.pdf
    • http://ciaooo.ru/uploades/userfiles/file/70207917419.pdf
    • http://onlineticketreview.com/images/file/fijopudezozul.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c2041526665---6633642198.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/fd01c353d4dcc15c33f8ea869d62770e/19173368175.pdf
    • http://cnex.cc/images/blog//file/sugaba.pdf
    • https://securityguardsupply.org/php/uploads/file/96464169399.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a0bff445943f0481dd841d2befa02cc3/lifikanoxexowojel.pdf
    • http://esoftland.com/userfiles/file/xekiwepajaxemuwadopabavum.pdf
    • http://donateagift.eu/userfiles/file/47143960444.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/3sghi5tiahpu3746hot4d80pp1/naxenevokokider.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49f1491847---20638667514.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_off0000d2fa.bin
556a09eeaf3fd0a2cf875af17500c1492cf8b195b386c11d5b701499d12ffd18
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FA 17392 bytes
font_01_sfnt_off0001008a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 16792 bytes
font_02_sfnt_off000118a1.bin
606c8fedd6bfdee9fd679165055030ecb164ffde38f48d053ba116133c45c49b
pdf-font-stream PDF embedded font (sfnt) at offset 0x118A1 10512 bytes