Malicious PDF — malware analysis report

Static analysis result for SHA-256 966f8967f203058d…

MALICIOUS

PDF

76.6 KB Created: 2021-03-28 07:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8995078e04f7f7594d9d40c5a6c6304 SHA-1: b6b9d73f0966141bfdcb55afc8157f1ff94dd62d SHA-256: 966f8967f203058d100dcac687b1faf196cf51cde71ee3a763c39a079c7b7254
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL points to a domain commonly associated with phishing and malware distribution, likely serving as a landing page for a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/award?keyword=mathematical+modeling+engineering+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379362/normal_5fd68c5049b82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_600c8127117a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460680/normal_5fcda9ba4a11d.pdfIn PDF document text
    • http://usacreditcheck.info/whatsapp_stickers_maker_apkh5rcc.pdfIn PDF document text
    • http://verifybadgehelp.com/what_is_the_main_idea_of_this_is_waters9lri.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/lopuboturefeno.pdfIn PDF document text
    • http://uscreditreport.info/brother_lx_3125_manualnwmi6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496225/normal_5fd02f8690494.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418746/normal_5fe00513704a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484605/normal_5fce55a017ccc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5fcc0ccb8b5d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_6014206dbb5b8.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/44794447877.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/buxalobisivarojabuwepuxen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_605ca7922c9a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447095/normal_6023ce029c445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475000/normal_601f0f436c8da.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/runizizanitevalinoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c86150a-1d85-4382-b647-3e1d4814aaa0/apc_br1000g-in_1kva_ups.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7362a50f-98e7-4bd3-a4cb-f59029248034/gedajuvuxusaxarifidumeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9075493-9d23-4777-a69c-bacc5ca86d17/why_do_my_apps_keep_quitting.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_off0000ef32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF32 5396 bytes
SHA-256: 818b030c4b0ba1cae7abd19af1bfaa1a0fc7470ee3037ac9d897b82f777a6889
font_01_sfnt_off00010170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10170 10624 bytes
SHA-256: b03c71f971474b447f355b236fdf737d19f9890cef7666ca02ec9a0941816004

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