Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0b3c361880b8f2…

MALICIOUS

PDF

79.6 KB Created: 2021-06-06 03:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 51621a8f2b0ce034913476134945ec9f SHA-1: 306a1b490ffb40717a6a7be1a26dab09f7c2d1be SHA-256: 6c0b3c361880b8f2c416a69d61089b8e974821fd1240fafc94102f943a07efe1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it is part of an SEO spam or phishing campaign. The embedded URLs are designed to redirect users to potentially harmful content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://queure.ru/wb?keyword=hp%20pavilion%20dv6000%20troubleshooting PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369503/normal_602e98c75541b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366009/normal_600496fe2f0ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385847/normal_5fde1230819e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411922/normal_5ffdc4009dd68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477886/normal_602124c43f1cf.pdfIn PDF document text
    • https://resevaguwitim.weebly.com/uploads/1/3/5/2/135298688/287933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482619/normal_6066ab0f54f4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_602a7cc272c4a.pdfIn PDF document text
    • https://pifabesi.weebly.com/uploads/1/3/5/9/135958575/xudakid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_6013a7cbe914f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_6021a80e4fab7.pdfIn PDF document text
    • https://meverofukibax.weebly.com/uploads/1/3/4/6/134620555/vulojale-gifulopuna-tanotomaviguj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482207/normal_606b38e4e89e0.pdfIn PDF document text
    • https://vabiwedewu.weebly.com/uploads/1/3/0/8/130813601/1150158.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d5a387a-b23a-465d-8492-cda69f58130f/1995_polaris_magnum_425_carburetor_problems.pdfIn PDF document text
    • http://gitefov.pbworks.com/w/file/fetch/144465822/tiffany_lamp_shade_replacement_for_floor_lamp.pdfIn PDF document text
    • http://lulatigono.pbworks.com/w/file/fetch/144534813/how_to_make_an_incident_report_format.pdfIn PDF document text
    • http://nowefuro.pbworks.com/f/free_printable_reading_comprehension_worksheets_grade_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3692d759-6861-4108-9380-c2e081107fdc/motorola_minitor_vi_programming_cradle.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144426783/english_grammar_test_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54165315-1c74-4f4a-95d3-13b729c73112/sri_vishnu_sahasranamam_sanskrit.pdfIn PDF document text
    • http://guronavageba.pbworks.com/f/convert_ke_word_tanpa_edit.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B9 5680 bytes
SHA-256: 26fffa550672292c3f19deb31c46d8b63d8bee923ec41a803a63e1e3140d15d5
font_01_sfnt_off000108fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FA 11268 bytes
SHA-256: a39da078aab02d10465148baa48d7ed99e5c4f14219a4d159ef70fd240c1435a