Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6dee603e4bd6fb…

MALICIOUS

PDF

75.0 KB Created: 2021-06-03 23:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0b00a6ef334432d232a7c9872b5135ab SHA-1: 58ad5bf5248c2b6c60dd6f9f026702df9ae0c75c SHA-256: 3f6dee603e4bd6fb650991926a676a8431af9a7ddaad937224f082a7b0543e07
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many pointing to disposable hosting services, and is flagged as a link farm. The primary URL suggests a phishing lure related to 'marie kondo book pdf download'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/pbw?utm_term=marie+kondo+book+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446930/normal_5ff2ff88d0b6a.pdfIn PDF document text
    • https://kezesefafuzer.weebly.com/uploads/1/3/7/5/137518356/puwiboguzuzaj-sosewer.pdfIn PDF document text
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/7893738.pdfIn PDF document text
    • https://vugilove.weebly.com/uploads/1/3/4/2/134234765/fujebureku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_606e7faf2e34f.pdfIn PDF document text
    • https://kolabobinojojiv.weebly.com/uploads/1/3/4/8/134880551/kufalubew.pdfIn PDF document text
    • https://vufofameti.weebly.com/uploads/1/3/0/8/130874118/ecea1c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409607/normal_5ff860755585b.pdfIn PDF document text
    • https://zesidorav.weebly.com/uploads/1/3/1/4/131437831/jigajowasatuzop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444100/normal_5fcdab81709b3.pdfIn PDF document text
    • https://fifusikusivupe.weebly.com/uploads/1/3/4/6/134638905/jizebop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zorisomofi.pbworks.com/f/xutolusijukagugigo.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144412131/80000745359.pdfIn PDF document text
    • http://togusan.pbworks.com/f/jomumozevid.pdfIn PDF document text
    • http://rorazokazog.pbworks.com/w/file/fetch/144504234/c_programming_balaguruswamy_6th_edition.pdfIn PDF document text
    • http://bopelijexuf.pbworks.com/f/how_to_combat_adverse_possession.pdfIn PDF document text
    • http://liguduper.pbworks.com/f/vrat_katha_in_hindi_download.pdfIn PDF document text
    • http://xawaren.pbworks.com/w/file/fetch/144418947/nejedinujesizadefujejaz.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144412248/marixijofazep.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 4868 bytes
SHA-256: fb10a542d87233232c27180e0e93422582f0caa36ae604e06ee3dd141f08d9d1
font_01_sfnt_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 11188 bytes
SHA-256: abc5348192de6dfd678803f1c0dc83670cf053eced223038a05f8331ad279317
font_02_sfnt_off000110b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361