Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e4cc95a5d38d50…

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 21:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09fe98c9c3dbab75803a21fa3f556fce SHA-1: 7f2e06d75101fef4ba4b058c41fb6bed9a506a0f SHA-256: c1e4cc95a5d38d50136be591c3d2946a2e28705b20e6245bb24a9f3e76b704db
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document's structure and embedded URLs suggest it is part of a link farm hosted on compromised CMS uploads, likely intended to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt the user to call a phone number, a common tactic in phishing and tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/i3h7ndus3anhhh4o2g0i66g284/webagojunil.pdf
    • http://aeronautike.com/userfiles/file/23135680738.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/200f7aed2a4f71574db36460ec820dc7/lojugesedusetazibodofiza.pdf
    • http://thestarbusan.net/FileData/ckfinder/files/20210621_3D40B2C79C381F4B.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/neqn53ucvgn8avjbh9kj3mqvkj/vidolakogofagosamivojuxe.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c9dc1124102---14646201153.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160992f9ce2b2f---53379327405.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/ec8c7f68d9ac1cacdd661596d2a8111c/wurebuk.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/429g5d57cdph410bao5rqiek0n/56160640722.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba7d102863---45570127078.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aef0323c96---womizusibovopagopipus.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8db7db1a29---63913562735.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160782c6a6c3e8---33569930882.pdf
    • https://soudurelausiere.ca/upload/editor/file/1504716665.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/cbef013be9286c5028a4b0c6a56d899b/lajisu.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c019dd8385d---96743913234.pdf
    • http://automsystem.com/UploadFile/file/20210506045849778.pdf
    • http://mesterek.net/tmp/wufoxulebiguxubuzodatowa.pdf
    • https://aartipalette.com/userfiles/file/rezixomupat.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/fvl5lr9irtn0enbv542ifj4h75/47721545399.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086d2de95f78---fogukulumatejipesori.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/9cbfaeb124b1605d71405849aac3c931/24225568508.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/0611538a129d5dd6f2b2252809d61b79/89744446536.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/s98j7b358ftptut94v6hbnfptk/gigiliromozipojabe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+find+center+of+equilateral+triangle
    • 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_off0000e564.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 16792 bytes
font_01_sfnt_off0000fd76.bin
cd14ee4602923ea7fa2d95e9ce17e2da3412aaddb381250a133814d9ddcdbd6b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 18636 bytes
font_02_sfnt_off00012fba.bin
57e6d273018c463190bd20a23ba4ec137837cd1c4746c5752de774a925687010
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBA 10808 bytes