Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8672e26e0ecd87…

MALICIOUS

PDF

256.3 KB Created: 2021-06-29 01:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4388f3623414ca9bcec8e78a9a1adf7 SHA-1: b0ab9bddb7129fad44e0fcd119bf40f5e24dbc17 SHA-256: 8a8672e26e0ecd87ec902ede85b5c5bc05af126e218a8ec3197096174deea417
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it may be used to distribute further malicious content or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9783

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085403e76962---748713332.pdf
    • https://cakenepal.com/userfiles/file/4957024473.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/8bd86a74d45c9cc5b0ac030a4eebb214/mopipikiku.pdf
    • https://condominiobrisasdelnorte.com/userfiles/file/wixamis.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/89d13t6hmmtm7cnlp08etstrfm/34747127037.pdf
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/14861205623.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ln1vmkkausukqvu9ihhfscfqu8/zisojazevur.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160721796ca4cd---69673776845.pdf
    • http://blesk-stroy.ru/userfiles/files/65998597149.pdf
    • https://akapacha.com/userfiles/file/73729425365.pdf
    • http://agnieszkapawlik.com/userfiles/file/30847671727.pdf
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/zukutubumazaw.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/44271329656.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a961c25f061---zozipem.pdf
    • http://aven.su/userfiles/file/redexisima.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/cnj66tuu8j3o4ldok8h8td4782/kepumupeludidewave.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16074d202ed647---48237521918.pdf
    • https://advantagelic.com/singhania/downloads/file/ruvon.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c1d69ef47---tutafijibujuvites.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/02dc62962352f4804021ef91150d3253/tipikanexufalopumuwewe.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d078ae442b---17383501392.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf1fe21919---44851062123.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607785e910882---lavenok.pdf
    • http://skomi.ru/img/files/file/54476056295.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/15033ccd806958288ce63427aae79350/46080073418.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=fallout+new+vegas+sniper+build+skill+points
    • 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_off00038e36.bin
9dae54eba61328bc180e53abc752083a1694e30b0236b4815b248d34e610afb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x38E36 19120 bytes
font_01_sfnt_off0003c131.bin
05943b2ed94bcd702195d53246739ab131c254e4c77f67dcbd8b958ccd50ed9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x3C131 11028 bytes
font_02_sfnt_off0003da9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3DA9D 16792 bytes