Malicious PDF — malware analysis report

Static analysis result for SHA-256 0125a02e9c84f47a…

MALICIOUS

PDF

87.8 KB Created: 2021-08-10 12:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1275ca12db47ca2b29e9d9ed4f12ac10 SHA-1: ca89cb4e000b2fae24a56a1e3e4e30f18287f249 SHA-256: 0125a02e9c84f47a52d19d9739c42fd68d6e98f03a40e5a80368b03dd125144d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drrajanmahtani.com/userfiles/files/sunepotoloda.pdf In PDF document text
    • http://pphjako.pl/userfiles/file/6021833493.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fc9279bc2---73581056301.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/zagikojepukoximadurupuki.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/tixelofegomarikokugolamuw.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724fb568578---68447753718.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3d7bd62ae0a5b0c1d6b6ee21fcc681aa/bonevilumiwokinowuxota.pdfIn PDF document text
    • https://samowar.ch/upload/file/solilifezafeje.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e83988fd21---didupe.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/i6m3tqqt3ksresfm9b453511d4/ditimamabogirenamuvukan.pdfIn PDF document text
    • http://hzaidele.com/images/upload/File/gutudured.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/0c8ba0e582ce903b7eb020253cbb257a/65310904909.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/fenipozuxalolarixawol.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/komajegodakig.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/sevizinekekexisuxelefat.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa738752b---82430686582.pdfIn PDF document text
    • http://allycatering.com/userfiles/duwimerewiditi.pdfIn PDF document text
    • http://mamnonhieutrung.edu.vn/ckfinder/userfiles/files/89010315163.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/76415084305.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/lovemurazakopavijopime.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb01e33f40---40514286905.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/bdaa7a6cfb317ade07b2913347a05aba/55189765146.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160afe027cef71---57240346048.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/jajiru.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/d3133b96f5309ac84d70819369994de4/kilukivonajazi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=fisher+paykel+drawer+dishwasher+troubleshootingPDF 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_off0000f309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF309 17196 bytes
SHA-256: 7169722fb3032c1de1b60f2b0627a7cc9187b7ce4a393d92108b676fe36f7e9c
font_01_sfnt_off00011f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A1 11180 bytes
SHA-256: 271dabdb7664376408b0eac961caaaee5b402a825613c13f3b2c027bc80d40f2

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