Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d13219e4b4e59ad…

MALICIOUS

PDF

80.3 KB Created: 2021-04-05 01:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 394527a28388f2bd344f7581ccf80024 SHA-1: c8c5d26121403dc573be1b84879b07e7b1e7b499 SHA-256: 8d13219e4b4e59adb746253d9494a99ae668254971c0d4d0715d07d737874014
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs are designed to redirect users to potentially harmful content.

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://seumenha.ru/strik?utm_term=interior+designer+maine+cost PDF link annotation
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/7045337.pdfIn PDF document text
    • http://kabonuwumew.66ghz.com/pathfinder_kingmaker_romance_octavia_guide.pdfIn PDF document text
    • https://gifivetusox.weebly.com/uploads/1/3/4/7/134736849/nedimelekek_tenuwejemakenig.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/botegoraputetav.pdfIn PDF document text
    • https://cdn.sqhk.co/koletexun/5hfNZKQ/billie_eilish_piano_tiles.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/7jjiMxe/children_s_place_uniform_tops.pdfIn PDF document text
    • https://magirodimape.weebly.com/uploads/1/3/1/6/131637482/tipunobukizo.pdfIn PDF document text
    • https://teregurejojexol.weebly.com/uploads/1/3/4/8/134879353/zawodizum-tupijuzujeruxuw.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
    • https://ce5d016b-e5fb-4004-af8f-35f61b829e22.filesusr.com/ugd/d7d7f8_fda2037104b54528b709c1d819662d52.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77da404d-8f91-45d4-9bac-e7d25a1b3bdf/how_to_play_havana_on_trumpet_notes.pdfIn PDF document text
    • http://waromewozepivo.rf.gd/luzeturofezilosilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa292620-38f6-4b38-8b62-fb64b823349b/how_much_are_catalytic_converters_worth_for_scrap.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_7f92d4ae047946d287a8099c7cd71b98.pdf?index=trueIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_ff2e2abf64a24d24b915c7e9c8cb6170.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57de82a4-475e-4781-aefb-be86da42e6cb/83832933502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5940cbc-027d-4a44-87f8-790dfa726d21/kitchenaid_stand_mixer_attachments_juicer.pdfIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_e62af14fce7e4af98a1fc015a08f35fe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f1b0399-18f6-49c5-b162-248575354f8a/38980736429.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_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 4952 bytes
SHA-256: 4441b7052d39bcacfd80938cbc6c2d1a86a0c594919bd681716b82827212fcce
font_01_sfnt_off0001009c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009C 10664 bytes
SHA-256: 1916713076526d3711067affe99ef8294fda7a32e4fe8b762a1fa50838ed7522
font_02_sfnt_off00012481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12481 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3