Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b967a9468f013c…

MALICIOUS

PDF

92.8 KB Created: 2021-06-29 07:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 75fe76c9d43646b73dd076ec629a8d5d SHA-1: 09bb3a7f11cafef8aaf660095ce3f1f81ab5cf97 SHA-256: 54b967a9468f013cd06ee6c38c67c047ee51cd293958d6ff619bc2f764c0012f
164 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for distributing malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=mouse+sensitivity+game+converter PDF link annotation
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b37aab5b2d---2013576755.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/80014571322.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95d6971b33---kevikebesawodevilomavit.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/6927255727.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/4c4d5f6f96413004d22bafb5f8eae750/37915775097.pdfIn PDF document text
    • http://dichvuwebsites.com/media/ftp/file/zijabagomefivit.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/xibadakirovu.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/k3sa8dl4pnb4va29lf60jc076r/43224346309.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/od1spjan63h5h4eb25f5qemtig/34710441996.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/s75u703entm2kq14vamgk1m73q/poxanujodudekupobijusidal.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/67676854272.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/e945mvs6vob86l7cqgesrcffdi/95983015529.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/e5356e890cd659c7a40731430570157c/51535243884.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/de02930afc750362dedc14d4613094b0/74874156810.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/jiqe3oq3on9m91ojctvfei7o9p/wosogimosamokofogegos.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/f4488934a43a8eb83dc2a831f3993051/20418852460.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae6f780799965c35cc372a4c9615c4d3/72861143478.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/d0b38dc1be0b992f30910a9c18aba5b6/55116172071.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/53752075090.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bc4a7ec33---juzelifejifapodi.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/76304959578.pdfIn PDF document text
    • 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_off00010171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10171 19180 bytes
SHA-256: 4c2b90f8bf9a679a0dc8eb9ee290fe708d6c90894e955b6dd20cf92be48ef4f7
font_01_sfnt_off00013359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13359 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B70 10800 bytes
SHA-256: 4055cb623573ae8b0c8633d8c18e2c45ce8010dce11827b3bda1d7c5045f0c75