Malicious PDF — malware analysis report

Static analysis result for SHA-256 b140175bc0c2200d…

MALICIOUS

PDF

68.7 KB Created: 2021-09-01 09:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 201a9eed4ec325cc3bcd06db5c547ef6 SHA-1: c4b8fc456273054d178fb0615764457fefb9e6a7 SHA-256: b140175bc0c2200d0510330527b51bc5808fc8d42ea0a3b71757c9fab8d60ba0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The heuristics indicate it's an image-based lure designed to trick users into clicking external links hosted on compromised WordPress sites and other disposable domains. The document body is heavily obfuscated and appears to be a malformed wkhtmltopdf output, suggesting it's not intended for direct user reading but rather to host clickable links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pixomot.ru/uplcv?utm_term=fuming+meaning+in+tamil PDF link annotation
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/045320a312f8ab3a627ccb64123cf41d/mogobitidozebegugepoj.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1b87a46b2---lozepenoletuwagujigu.pdfIn PDF document text
    • https://europartner2.pl/uploads/lonirosafune.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b83961c4a7---11425336762.pdfIn PDF document text
    • http://zuche0551.com/upload/file/13493605828.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/68203565502.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/f7fd89c2595cbd0d8452b3350bbe63db/lidonegalojerux.pdfIn PDF document text
    • http://millecolori.it/images/file/sitebokapupulakodideji.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/nokimomofimawarivowi.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021082203590773499.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/8283145012.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a3e52e495d09127aecaadf12b80d7fcc/46340270532.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed019de389---61568025092.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/93724013773.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cacd41143e5---sasemiwoguse.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/wafemagitejadulu.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/43221139462.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611efcefa209b---71016952788.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/dc2cbe7b53355365927969e52106b01b/15185776935.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/taduriwalasepuwekit.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/38676732483.pdfIn PDF document text
    • https://sealskinz.ru/files/file/75484887689.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/li8i74emr2v7rmgtgp4slatbpu/favivosomagunepanaraka.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/20964098161.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/f4c30f5b463f6a349e104717fd815b36/texip.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F9 10140 bytes
SHA-256: 6ca8603f805db19b9e12e68156992ce819a6d5e829811791f0ea2554773b5067
font_01_sfnt_off0000c884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC884 14276 bytes
SHA-256: 0233f51b4c14aa15d615afe8f2df9a6d24c4426a929321a08b6206f6a7cf567a
font_02_sfnt_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.