Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd9da1c7ef8f6fd…

MALICIOUS

PDF

72.0 KB Created: 2021-03-01 21:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f5be2d6c07d8c4dcc8c36d79c646e709 SHA-1: e010021cb3d6a7e0b3d588b5ef248128fb95ca38 SHA-256: 4fd9da1c7ef8f6fd5206faf449cd2df69671582be9f759658aba588c927b0200
126 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content or redirect users to phishing sites. The document body, though heavily obfuscated, appears to be a lure related to printer maintenance.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/award?keyword=hp+photosmart+plus+b210+printhead+cleaning PDF link annotation
    • https://cdn.sqhk.co/sewuvavimebi/rz0jjic/75001294665.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/detaralofijogafileg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374840/normal_5fc8ed557bb94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465259/normal_5fcdfec54a684.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455374/normal_6002669c03b73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403264/normal_5feb94f8cad8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478123/normal_6007e1badedd3.pdfIn PDF document text
    • https://jojobejuw.weebly.com/uploads/1/3/2/8/132815094/9172893.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413457/normal_5fec9b77e38d8.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/dAtQjhf/kefixiliviwexekabuwe.pdfIn PDF document text
    • https://dabamupusoga.weebly.com/uploads/1/3/4/2/134265366/jokopinexiwuva.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/Rjd4ncM/carx_drift_racing_2_ps4_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/hfgijia/hume_bank_term_deposit_interest_rates.pdfIn PDF document text
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/7814964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_6024cd7b33779.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/gQamjgi/rasemipewa.pdfIn PDF document text
    • https://nolilozeto.weebly.com/uploads/1/3/5/9/135957670/padabi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB23 5916 bytes
SHA-256: c48325a5367d352133b1538fad48d69c89373007344b631cdb4a06135bc766db
font_01_sfnt_off0000ef16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 10472 bytes
SHA-256: 1a89c70babc16e2180465978833a30b4b92269896ca5db1e0ea8c6fdf48e31b6

Open this report in the interactive analyzer, or submit your own file for analysis.