Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb72277afdbd858…

MALICIOUS

PDF

69.0 KB Created: 2021-06-09 03:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c372fceae3bd11cb6fcee706ceb5077d SHA-1: 6cb93db73b5fe7ce3c78239f9836192b5e1d1612 SHA-256: 0eb72277afdbd85847d5eb4a464791dbed3c4d125ccfc6b0c91a6ac9aa481a6f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://drafthe.ru/pbw?utm_term=gta+duffel+bag+glitch
    • https://ditaxufuze.weebly.com/uploads/1/3/4/0/134040401/dcd58c1b375772.pdf
    • https://nubugudapo.weebly.com/uploads/1/3/2/8/132814946/8052419.pdf
    • https://limudetoruvuvo.weebly.com/uploads/1/3/4/8/134890021/7625915.pdf
    • https://jipunusib.weebly.com/uploads/1/3/0/8/130813609/5860653.pdf
    • https://jimoporifu.weebly.com/uploads/1/3/4/3/134378689/mezixakile.pdf
    • https://lomixefewagad.weebly.com/uploads/1/3/4/5/134592496/jewiwidafefuga.pdf
    • https://soremasev.weebly.com/uploads/1/3/4/7/134716172/xawapigorutujuv-lobanomateluk-rimejurani-wawuzixosodelij.pdf
    • https://nikudedixipapun.weebly.com/uploads/1/3/4/6/134692686/a2ced0c.pdf
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/pimojisuvekivad-vowogudo-vebavuxidutomu-mukakudef.pdf
    • https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/1640682.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wiwedano.pbworks.com/f/11677720012.pdf
    • http://dajodovilav.pbworks.com/w/file/fetch/144532470/how_to_program_a_rca_universal_remote_with_code_search_button.pdf
    • http://tagiruxot.pbworks.com/f/tujifumewuj.pdf
    • http://wemilamozede.pbworks.com/w/file/fetch/144795870/mepuxudeli.pdf
    • https://uploads.strikinglycdn.com/files/48bd85c9-4822-4689-85d8-1d8701e09fb2/kobalt_10_inch_miter_saw_blade.pdf
    • http://rugewenuzed.pbworks.com/w/file/fetch/144423483/23655933805.pdf
    • https://uploads.strikinglycdn.com/files/5e9b1c39-d186-48c7-bc20-d415e56d24ba/18524601750.pdf
    • http://gopamux.pbworks.com/w/file/fetch/144894582/new_cloud_tv_premium_apk.pdf
    • http://duvetemeb.pbworks.com/w/file/fetch/144907626/tikudafixubin.pdf
    • http://siwuromo.pbworks.com/w/file/fetch/144576423/23246707630.pdf
    • http://xujefix.pbworks.com/f/guzuderasipikud.pdf
    • https://uploads.strikinglycdn.com/files/1279cf4d-3684-47bb-b93d-7fc3cb4d5c54/dymo_letratag_tape_colours.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1bc.bin
7dc8b81eb30f47c14b4fd2e72bbd29d70d597334dbbe20b59d5ad7afa964dbc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BC 5180 bytes
font_01_sfnt_off0000e363.bin
e93f80ab4b132b4d8cd71534349cc05d5e1de57c26da07305525d3027b840937		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE363 10560 bytes

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