Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3e490f7b21e027…

MALICIOUS

PDF

86.7 KB Created: 2021-01-26 18:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1afae60686aee6c9d4fe6e68e4df9a05 SHA-1: 4e43826fccee02eeb2d8678167dd4adf25f5c9de SHA-256: fc3e490f7b21e02708de8393fc25b3d2509b1214fbe60d7aab96bf5e061c4872
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier output strongly indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=f+stat+anova+table In PDF document text
    • https://cdn.sqhk.co/fovipobex/ZhAhijg/92568425437.pdfIn PDF document text
    • http://vekvelo.ru/149297467156tdzu.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/atnOAQX/does_apple_store_have_black_friday_deals_2019.pdfIn PDF document text
    • http://sweetygirl.club/luck_prize_machine_fidget_spinner_for_sale889th.pdfIn PDF document text
    • http://fresh-ita.fun/wapuzabujakobinikedqlmgk.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/hohhggh/sirarunotajekerifigog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5fe9c5e38c252.pdfIn PDF document text
    • http://lestyprin.online/bendy_mod_downloado80py.pdfIn PDF document text
    • http://kefets.xyz/sekebatejufawadogevojbli.pdfIn PDF document text
    • http://presentinsta.online/wajaromerotixovutiwogi166.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dabatisew/69726441380.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/webuzejekexobikuma.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/free_planner_template_2020.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D2 4736 bytes
SHA-256: d9d7f9da3c5dc0b64b684e86ae25fb47b914789ea26e4ac77fa0f8be9d16154c
font_01_sfnt_off00012609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12609 11684 bytes
SHA-256: da9e5a14e4eb61b5743347939025c059d5191587178cc6b93475c7649ab60b19

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