Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d36ad1d75655bdc…

MALICIOUS

PDF

88.4 KB Created: 2021-06-25 12:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8d26463176ddd8378d5df3e73ba4709c SHA-1: 8ce86c74b827f7e750093f7528139f388968d383 SHA-256: 0d36ad1d75655bdc01104b577d756329b33036b515a44f51dcc90bc6027fec65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic firings indicate this PDF is part of a link farm, likely intended to redirect users to malicious sites for phishing or malware delivery. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://catamma.ru/uplcv?utm_term=convert+pdf+to+word+chrome+extension PDF link annotation
    • http://eau-msu.ru/ckfinder/userfiles/files/18222967698.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/nixonuzedudusuwepakir.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/28413750470.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/2166972473.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/womiwunepumoxipi.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/qf011p8ho6auulhiqeref9o74k/73801197975.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/lutolugonabonekemikanobom.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a51a66223---96051176155.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/bewiwakenujis.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/ee12f55a7fea7080e8663f400121f93c/71600939167.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6213ac2a0---6003397991.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58a27a8055---vipipukizen.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7977c4539e---13435203439.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/82915663684.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/gimizaxajamunipesezuz.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_off0000f5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 16944 bytes
SHA-256: f0199e7a40eaa14dd6c796e5c12f00d34ed211e194a41836f2a43aeee72b8354
font_01_sfnt_off000121d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D3 10960 bytes
SHA-256: e025b419ad0a4e701256137f2560e425c1c30db84be91408ab35d5b80af68195
font_02_sfnt_off00013b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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