Malicious PDF — malware analysis report

Static analysis result for SHA-256 b226d8c179c50f52…

MALICIOUS

PDF

83.7 KB Created: 2021-06-29 15:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 56a9469a044ddfd6d34350fb2cf34421 SHA-1: 7df957e028b48c14cc1864ae6ae66977326d9645 SHA-256: b226d8c179c50f523d0f3d12e1c7880ef8593167014fcf68ba59d4d663993259
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1539 Steal or Harvest Session Tokens

This PDF document is flagged as malicious by ML classifiers and ClamAV, and exhibits characteristics of a credential harvesting lure. It contains numerous links to external sites, many of which are hosted on compromised WordPress installations, suggesting it's part of a link farm designed to redirect users to phishing pages. The presence of MFA/one-time-code harvesting lures indicates an attempt to steal session tokens or bypass multi-factor authentication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608126fb8b889---tupotiwesute.pdf In PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/l68csta5ab6qjmk4dku9cmspjs/xiderasixiragowonaba.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/51a78514b60bbd1d340de683393b3c77/1648032646.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/27982382762.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072e8d2b571f---sezuxeriwe.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/o633ga9685kr5p5fs1liifevu1/768550056.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/bda2d7f10e1f0896c38d4a1d890da4d6/nubojujukusad.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/6fe4bfee6417e7c17104937c6dc6981b/detebuve.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/18600471779.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/2vidukai3vv69jhnm8r3jqfg9t/83840794900.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d4ed347d7---nitifuzolitike.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/82144708965.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/69je7nq328055piavfe8etud31/busubobuzozij.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f67d734fe8---51567655867.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3d8803726---41886372034.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c4b8d0ace885cdc6526d1193011638c0/zepinosovibepidazo.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160beefe6682df---kemimiba.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/diridesujanuforat.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607132c5843d8---jogunizosasipazogosuz.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/devavew.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d548c755f89---98958726792.pdfIn PDF document text
    • http://amandamaitland.com/images/file/luwenitabuwaninuvisaj.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/roderolixeverarobuvowiner.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/f1kngfm68uav7qrlegemqmiir1/87271287332.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=afk+arena+code+pagePDF link annotation
    • 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_off0000e596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE596 10464 bytes
SHA-256: 322cb72f92f3e1c99b69237a6d6d4d7eba38ce410f71f1fb049c1967bfef46b8
font_01_sfnt_off0000fd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11550 17540 bytes
SHA-256: 8123df8b7fa13a31a69e5b912e26c1a4b93e63a171f3fb79a106a85b5dd1272e

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