Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee38b34fbba01402…

MALICIOUS

PDF

81.7 KB Created: 2021-06-19 06:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d02da6af6a1f5c16b0cfe2c9bcda51c SHA-1: 9e80700b1646b1e39487d049b4fba7656b9926a0 SHA-256: ee38b34fbba01402c6e1eddf971f5e7bedad723597d4e6e09bf7584f1cc1574a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous links to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users to phishing pages. The document body, though heavily obfuscated, appears to be a lure related to financial transfer details.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://huntic.ru/uplcv?utm_term=fundamentals+of+heat+and+mass+transfer+pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/76a555cf0d0382dc6ef711f28cf6d58a/93536078280.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fb23be62c---penozixukukifud.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afb4cd1032---musafanetabanonezixa.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/s70b9t0egpcsr7f4o76bneibe1/5536387455.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd1580200c---mesivunexeriwezodewijan.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607792a11fcb3---wapapafokuraxitumefazikiw.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2a02da482---vamigifekuwamijufatuvej.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/086290072bec69c40a695b2689d93bf9/zidiguserakujaxuwutaz.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb39f38b9e---lirakiwufalamuk.pdf
    • http://mazdooradda.com/userfiles/file/xufikuzaxog.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/974ren0gt1t52tl7a6j5mamto2/44764224336.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609467ae44b4e---74959805409.pdf
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/gisap.pdf
    • https://summit-christian-academy.net/scauserfiles/files/82967407791.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c278863f6f---ruwexawexe.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/97a730f3c5fa3212267bbead6c79ad83/fujinuwi.pdf
    • http://akinmedical.com/uploads/file/ginininerisizofabeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL
    • 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_off0000eab4.bin
f538a1cbb89a3edacfb755ab2a04701294b8c2032eebde498f631a93f9367805
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 5236 bytes
font_01_sfnt_off0000fc5a.bin
157f2450551473703be343fd01476ff14ca4f30199b6da128957285d8f38ce83
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5A 12300 bytes
font_02_sfnt_off000123c2.bin
c5b81f703ebddc697e6824868dcd306aba919aa4c1ec28f594a83a04df97872b
pdf-font-stream PDF embedded font (sfnt) at offset 0x123C2 16144 bytes