Malicious PDF — malware analysis report

Static analysis result for SHA-256 601ef206db7cf42b…

MALICIOUS

PDF

199.5 KB Created: 2021-06-29 17:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4d59a9a6642545b49db930ee6b3e5596 SHA-1: 2540e1547c9e07b9c56ce9bfc0fb89c30561a6ab SHA-256: 601ef206db7cf42bb71b0c8d087a0979070a357e6fe33ed3948c83d713326847
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' indicates an image lure linking to an SEO redirector, likely to obscure the final malicious destination. While no scripts were explicitly extracted, the presence of numerous compromised URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f74419a0b---rupox.pdf In PDF document text
    • http://efuegypt.org/userfiles/file/17935632143.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a382f42b012---93598373833.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee3c828287---zefezobu.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/4886f4f9e314581d57618e2769868aec/97508440818.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/34610588395.pdfIn PDF document text
    • http://essuances.com/ckfinder/userfiles/files/lesabitun.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/51842776460.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/42750419133.pdfIn PDF document text
    • http://greenbrier101.com/userimages/60782695076.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c94743c992d---majigunapidasepifezu.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078046192930---37200258182.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b603f1bbea---luxabaku.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/a34f36b4b0acec0d873bee63fa1216d3/rabosesopojoje.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/nexika.pdfIn PDF document text
    • http://gtshotel.it/images/file/68169606892.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/mipixigekudepasakatizepod.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/j80dk9ae519a3082krka915uu7/vabebokarew.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f28865e693---wiruremexexumajefejolusi.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/31035465636.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096256b74e94---losajuriloxesonevuwomene.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97c2221fea---gokugirelolo.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/f490f89b09d37f47b74f67f8acf0f217/8872042610.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/31242979172.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/89542905673.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=to+be+literate+meansPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ac3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC3B 20484 bytes
SHA-256: fa6a8d20c9729f5aa678381933749ea6d53a81c072f4c03a6f11cbc7c62b571b
font_01_sfnt_off0002e0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002f8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8C8 10372 bytes
SHA-256: ec4c2db5f57ad5858cfc9644fda56c10ad696612e111afc88f77317651f86a63