Malicious PDF — malware analysis report

Static analysis result for SHA-256 95072b5f32c921ae…

MALICIOUS

PDF

76.2 KB Created: 2021-06-26 08:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61ecd4fb2959500b74d50af2068f0916 SHA-1: 17c6271dd72f55c8a963dd5797f993fc6dc289d8 SHA-256: 95072b5f32c921ae10356fd47a26f359bff16a60e8c5313ec8add9dff9522f3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://laborke.ru/uplcv?utm_term=routing+for+u
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/3a8492bad9857a0d6da9f3a412868590/61619036959.pdf
    • http://hopkinshigh1961.com/clients/878968/File/xibev.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/23cba7b87589e7678c862d841bb3f830/82412157090.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074423c5133e---nexenuwe.pdf
    • http://kingalbertltd.com/uploadedfiles/file/kawutupitetiwixopo.pdf
    • http://tunglamgarden.com/images/fck/file/50014929905.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/woligipaxurefuposoletob.pdf
    • http://alimentosldm.com/userfiles/file/sewukotokesuzemisofaludop.pdf
    • http://jeyadhurgatemple.com/userfiles/file/vinovivavukiru.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/b50b52113752093d259e1beefb78db32/79986988939.pdf
    • http://www.aqsclimited.com/EditorImages/file/71600088167.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8bd2d65eecac968236aca77c5cdaace6/13532925938.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/2d28c07c8c8744eeadfd04fb07710f31/59586267983.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/812256cf565e0127f0b878c24fd42e19/wopijotarajovalosuvex.pdf
    • http://tfforming.ru/d/files/65032119376.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd0083dcdf---12223349078.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3eb456d34---puponivelumu.pdf
    • http://stroisvias.ru/userfiles/file/kagejukirepulu.pdf
    • http://broorybulldogs.com/clients/33993/File/59613763457.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/6b51238fd9cd3ec584d7c6c1b0e24659/26745023027.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07735eeaf---7526063024.pdf
    • http://chinhlytailieuluutru.com/media/ftp/file/zamawiri.pdf
    • http://automotiveenergy.cz/userfiles/file/87381970063.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/361b4c70cc2a3088be996f0171888a11/75961120380.pdf
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/6410197f3d57abd75c3a9065880ccc25/17193734193.pdf
    • 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_off0000cbde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDE 16792 bytes
font_01_sfnt_off0000e3f0.bin
9fdbb45985fbfc33980b8fc4f9fccebff543e27181f45575ffc344be272f35af
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 16036 bytes
font_02_sfnt_off00010d27.bin
8f9ff7cc4bb27bc4d2b77ac67d4c9fed2e9651f69eb388ef2fd146adc5e3cae5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D27 10024 bytes