Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe17349a14051e9f…

MALICIOUS

PDF

84.5 KB Created: 2021-07-20 01:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39cb9b4c3e941c99754d12ff2bf2fa5e SHA-1: 9d89f1aeb88856a282c1d1c485b53295487444bc SHA-256: fe17349a14051e9f1743e0081d0381700e7cbb78e0df42d87bb992ddc5d3d588
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/cr1e0vbr5gt82gtrijdp4dqrhv/bofepakepigu.pdf
    • http://www.tobywells.org/media/fckdir/file/2384990440.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/931674eb1a5d10e1e375fd5fa5dfa6c7/mijeti.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ee54fa811f2---lekedezesimifidejeta.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/464b97a6a081b835ab8134a11d13f07d/42108261082.pdf
    • https://osikovo.eu/webroot/img/content/files/63072074632.pdf
    • https://szud94.hu/img/sajatfile/files/42838871097.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/newabugovutapop.pdf
    • https://diedacorporation.net/freesiafiles/file/pebemazanu.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d47b15d2ada07fd0ca6155b7218e269c/kofilutitazozowojukil.pdf
    • https://akanaymatbaa.com/calisma2/files/uploads/78704539409.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/bbb7ddf489cd96cd99beed76ec78770e/jotejadajubisugebebu.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f975ab7508---80751014698.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160700dd0136be---39626130887.pdf
    • http://nbpcpentecostalchurch.com/clients/65183/File/zupiwabewibisa.pdf
    • https://inijariku.com/ckfinder/userfiles/files/40460105434.pdf
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/gejexefatijijav.pdf
    • https://tasleemdubai.com/userfiles/files/vewolixavowogowoz.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7cd533d5c---gujurafewiz.pdf
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/todurumanoxonuwuzexel.pdf
    • http://dancephoto.ru/userfiles/files/4217991201.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608189f49ab9e---57547718367.pdf
    • https://abugfreemind.com/userfiles/file/vukuvuxedilipegi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=people+related+skills
    • 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_off0000eb2e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2E 16792 bytes
font_01_sfnt_off00010345.bin
b8ee85b95cae55cfb805308511c939371433862caa1a56900d8de0b5559ad67e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10345 10376 bytes
font_02_sfnt_off00011ad8.bin
34aa6ab94228977fc9f6a14695b0e3e850a44bbf027dd1250a693c414035c4c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD8 16364 bytes