Malicious PDF — malware analysis report

Static analysis result for SHA-256 e394a417646c236b…

MALICIOUS

PDF

110.5 KB Created: 2021-08-01 07:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b035e3b61492f54f0b5e6acf25ca7e95 SHA-1: 5210562f1bf8b3209bcc40150dc369c4d38d15a8 SHA-256: e394a417646c236bfd6d93e5a20d010a95de1ea89458dd1c99a37c3a324defc4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of credential phishing. It impersonates Microsoft and provides a link to a suspicious domain, likely to harvest user credentials. The document contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm used for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://pixomot.ru/uplcv?utm_term=car+drifting+games+unblocked.
  • 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://pixomot.ru/uplcv?utm_term=car+drifting+games+unblocked PDF link annotation
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3648eb3c623ffd383cd63bfbbb20a6bb/tuxunusowa.pdfIn PDF document text
    • https://brod-plovdiv.com/images/18381996160.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f462e27ef43---12044343755.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae10d1f740---zamezivezukufejatiz.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606fba28b481a---gopegow.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/7l0fu1gp9o2a9i90u03p0222rc/72866319697.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/67875166344.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e067cef1c---bumutufi.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/viduxiruxolilesef.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/l9deucnls63fdjkrde7vn24984/67754716523.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10a4968f1e---4559521310.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e8b7412238c---87611743833.pdfIn PDF document text
    • https://tl-systems.hu/files/files/bavazikop.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/8g2uclpfkve2bj3k7dc2tgj4m4/21249446016.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160acd867baa71---rojolijigazita.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/30087529124.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/5282773471.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/24140299351.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/mpq4rn16an466l00n4ul1ao90a/bumulolonazelimudofi.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/kijupizegurobun.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/zewuxok.pdfIn PDF document text
    • http://stonebriarranch.com/clients/876969/File/73333615674.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8b5d841419c4b9debb6318410776b2c5/bukaforu.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_off000147fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FD 11184 bytes
SHA-256: 53ef82818b94dbb4a447c941c7a5c410b4c36ddf022f77972b3f42b7ad3d650f
font_01_sfnt_off000161ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161EE 19044 bytes
SHA-256: e699c86769ec431799afa777a62aaac5bc9bf6d2aa36d16677ac48f317741a47
font_02_sfnt_off000193ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1