Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01035e9e097ed8a…

MALICIOUS

PDF

89.2 KB Created: 2021-06-27 22:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43bd39730997b3d4ded33ed55f7167cb SHA-1: 933526ba69a11ccf977f6c849611ab91c4ee4d71 SHA-256: f01035e9e097ed8a82088294ee446c8221f5d078fdcd764b9587a9e237420d80
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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.
  • 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 http://akinmedical.com/uploads/file/567351377.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/deec58994e4c9ba0160d68e4b1172aaf/1602130078.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099babf23a7d---ruvulexavuwoniz.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0d459bfcd---tugigagirubadozuba.pdf
    • http://www.uniformsolutionsforyou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d20c4d5932---75646967237.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dd7396fb2---padawidujabakuzojusejonij.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918d0174cbe---pikidolezu.pdf
    • https://askisan.com/upload/ckfinder/files/wavazeradenifamabe.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608f81d28273e---18252722893.pdf
    • http://www.biotanika.pl/upload/file/viwowetejekapojovu.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/748eb745e387966702210c049669add4/96249301327.pdf
    • http://agiusfuneraldirectors.com/files/file/31959716229.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e54c5ea4d---10120487387.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844b444f784---fowemuvedokobadebirulodem.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb0bbf2876---81566142818.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e42d82c410---46757599489.pdf
    • https://akita-inu.lv/www/files/files/76938941140.pdf
    • http://jingluo.net/uploadfiles/files/50590012269.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084eae64055b---26028433647.pdf
    • http://phantasos.org/userfiles/file/magofa.pdf
    • https://topupdana.com/contents//files/gulolu.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084cdcef036c---goniwigalugif.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a1064881be4f38e3713e56f76dbc94d/96073308928.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/clqno43u86q0ovo3e8vn20eabq/jamegivijidapediwatetelob.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/tapunilubonupovital.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/g3p3527pc7o9o6b4fodimg0gd6/padonunotoba.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+grand+sophy+read+online+free
    • 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_off0000f987.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 16792 bytes
font_01_sfnt_off0001119e.bin
5ee085c258a3b6a3e9da03ec8175003270bc7e9f8e0b0487300cb7c966476dc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1119E 10756 bytes
font_02_sfnt_off00012a09.bin
18e62c9b858f1b6436119a27bfbc6bb8cd1aaf5369b087cf712357c3b9ca95a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A09 17568 bytes