Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4016f6ad831b321…

MALICIOUS

PDF

158.9 KB Created: 2021-03-29 11:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4500d1329adf0ef17313cc03d3af8f6e SHA-1: 9725fae535ee05668f695045eb43808662f5cfec SHA-256: c4016f6ad831b321cf7ea4a847c26fbbb34b3029ad5b180f6060b0bdd761b822
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • 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 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://soxebez.ru/123?utm_term=agilent+bioanalyzer+2100+user+manual PDF link annotation
    • http://yewes.space/unicorn_picture_editorhdwc5.pdfIn PDF document text
    • https://cdn.sqhk.co/rapalaxob/giIgcgj/stickman_ninja_2_hack_appvn.pdfIn PDF document text
    • http://presentinsta.online/tenncare_attestation_formuqa06.pdfIn PDF document text
    • https://cdn.sqhk.co/digiwejasipu/ihaP0Mq/web_designer_assistant_salary_canada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_604a509d6ebf3.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/iUhgiap/77958709786.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/r8ibghc/troll_face_quest_tv_shows_level_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482009/normal_603e4a553d0be.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/d5gf60K/gbc._emu_apk_1._5._37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_604b880dba3fe.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/Nfniehg/top_metal_packaging_companies.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/eXiggj7/folilegis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367952/normal_5feb92c4cc8d8.pdfIn PDF document text
    • http://osummer.space/fmcg_industry_project_report9zuzb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453740/normal_5fe17f036b4a4.pdfIn PDF document text
    • http://my-favshoph.online/object_pronouns_worksheetevs32.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/742a9c40-e006-4626-8667-d266bc7832c1/names_nombres_by_julia_alvarez_summary.pdfIn PDF document text
    • http://jasagedonemope.epizy.com/wowivutobudakejugax.pdfIn PDF document text
    • http://tapopopabe.rf.gd/how_do_you_test_a_landscape_lighting_transformer.pdfIn PDF document text
    • http://riwigov.rf.gd/heart_broken_status_for_whatsapp_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca4bf550-ecc0-46a7-ab51-63bdb21fcf86/ariens_8526_engine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b935224-98e7-42cf-bce0-7256ee055662/black_and_tan_piebald_miniature_dachshund.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000230b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x230B9 5612 bytes
SHA-256: de22628e44f8f6018152ce7e0cd1bffec8fa35b483e01fa7cf830d49e0869288
font_01_sfnt_off000243d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x243D8 11628 bytes
SHA-256: 4e0843c4f6d527b4359617a05670b6a1b53f2eff2285c9d41e3e57ebb7416f25

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