Malicious PDF — malware analysis report

Static analysis result for SHA-256 621954bbf54f3769…

MALICIOUS

PDF

72.9 KB Created: 2021-01-27 01:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4cae56304e1e8ee499e6d4915e8d2bd8 SHA-1: 075e8ae9207edb637bbebac284c856ff4a615de4 SHA-256: 621954bbf54f376982010c1b087ca8fe2aff8eb4c1111129ec2b0490873ec181
186 Risk Score

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://leonvi.ru/wb?keyword=fantasy%20name%20generator%20female%20demon PDF link annotation
    • http://remontvorot24.com/most_epic_dragon_names848uc.pdfIn PDF document text
    • http://podeves.xyz/46525750793n0lx.pdfIn PDF document text
    • https://cdn.sqhk.co/tofatuxurejo/d8gjjih/pugibeti.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/sikiwomo_wuzoroli.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/zupubitomu.pdfIn PDF document text
    • http://remontlegko.info/2025072113nz1zv.pdfIn PDF document text
    • https://wuwabisa.weebly.com/uploads/1/3/1/6/131606234/9f8cd33a7b9b127.pdfIn PDF document text
    • https://xozejobe.weebly.com/uploads/1/3/1/4/131406614/3620bbb619d24c.pdfIn PDF document text
    • http://jidugisukeranav.iblogger.org/video_player_for_pc_filehippo.pdfIn PDF document text
    • https://sepebukov.weebly.com/uploads/1/3/1/4/131408100/eebc3ecb3dd.pdfIn PDF document text
    • https://bunekapizo.weebly.com/uploads/1/3/0/9/130969144/a2fd003.pdfIn PDF document text
    • https://cdn.sqhk.co/worenora/WhdhfXV/delawi.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/hib0Uhj/android_car_stereo_factory_password.pdfIn PDF document text
    • http://balifruit.com/24562631206e34ms.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/Hicxjid/kopavivibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jijetebum.epizy.com/54681002469.pdfIn PDF document text
    • http://tedivepi.epizy.com/78160341386.pdfIn PDF document text
    • http://vizulubafaxal.epizy.com/label_plant_parts_worksheet.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_off0000e058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 5284 bytes
SHA-256: e69497c423a98fa1f1f7bcab107295b170786d9d57f42ae69ecb19dadc4109a0
font_01_sfnt_off0000f242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF242 10588 bytes
SHA-256: c9602e6a87376f693220ade84b26e4626b97f8505612d496ef548cf147d26c8a

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