Malicious PDF — malware analysis report

Static analysis result for SHA-256 350ed0a0cf716222…

MALICIOUS

PDF

86.0 KB Created: 2021-09-07 13:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b39069275cf2e51f32fd79fbb800be98 SHA-1: 4f5c73f1e08816cee3a711e5d265a9fe0f5ab52d SHA-256: 350ed0a0cf7162223c4c495aea6b074e22b6433a2ca27b2fb1bef803bd139cd0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. While no scripts were explicitly extracted, the nature of link farms and compromised CMS uploads often serves to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3253

Heuristics 5

  • 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
  • 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.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084fc1f4e06f---47644561498.pdf In PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/nebazowaxumaziwawujoti.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/pojewejibidobabevitiz.pdfIn PDF document text
    • http://oodow.cn/upload/file/210624203403402211t55kw24bfz71.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/42518104378.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/ebc4cb25c76a0b8720f9b90cdfdb2e5b/bedadumojanimov.pdfIn PDF document text
    • https://bem-sa.com/img/file/vogofatakaladomufexek.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/feniv.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd7469b71a---36295966881.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/42456ac64109e0bb328f20fc424651a7/fanisapimuramusagosud.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/4fc087db13f6c8eccb22e5703fbc3f07/62693886285.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/1f70cc88cfaa1a88386ec149d6a90b7c/gikavazenitafifevike.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/46580466895.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/c0657f9aede359040f87311b905e55dd/13768241577.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/98014546629.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/xidikawokaselun.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/94041185565.pdfIn PDF document text
    • http://bipaf.org/2009_home/upload/editor/file/5667404470.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/5af10caa01acf534020d5c6c26048a84/sukizawowukeferadunasuka.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/50238765643.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/m1775rkuat73p4rffpv269hr64/14982115050.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b3be3a782---92148778314.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ithbfn27udvafcv9do2jcno9pa/48045821766.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf56a1a4106---83490384077.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///vebiwiwemaxositisi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=acc%2Faha+versus+esc%2Fesh+on+hypertension+guidelines+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 11196 bytes
SHA-256: 5f9b9dc58933c8c5c9cc1aa2bbb127153c12e80d871940fa3c80e1fae5e6ca2a
font_01_sfnt_off00011cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBF 19676 bytes
SHA-256: 978aa3dcc42966756c12dd21c468be3243d76713981778e1f6c39cb1145d17c4