Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66a8333c9c6e9fd…

MALICIOUS

PDF

73.8 KB Created: 2021-01-08 20:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 546d7badef6660adfbc6ce0d96000919 SHA-1: aaebd316a03a437e26070a98a0bf7f6328668b50 SHA-256: b66a8333c9c6e9fdfc367988aaedb20503db32e365fc2584564d1bea0949969b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it's a phishing lure, specifically designed to redirect users to an external URL. The embedded URL, https://traffset.ru/123?utm_term=stihl+2+in_1_chainsaw_sharpener_sizes, is flagged as a redirector for free-download phishing. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest an attempt to trick the user into visiting a malicious site, likely for credential harvesting or further malware delivery.

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
  • 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://traffset.ru/123?utm_term=stihl+2+in+1+chainsaw+sharpener+sizes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5fbcb24d78c1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5fde1f95bd6bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5f92763453aa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498986/normal_5fee175f3b3f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468554/normal_5fa756b769244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470703/normal_5ff62b6fdff27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5ff0c96b18220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420612/normal_5f9e3978d1a56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_5f9f91fed37ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_5f9478d47aa21.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://s3.amazonaws.com/zafaronivaj/alton_brown_marshmallows_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1587d263-f9c4-4613-a227-fa68a2a59721/69035224249.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_off0000d6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EA 5128 bytes
SHA-256: 6adbdb86dbaee77f602aa24cc14a368f9c786e59ac56b458221b9471ad74864b
font_01_sfnt_off0000e858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE858 10664 bytes
SHA-256: 775a172de16891fb4c5b9b718040534d24444537a4ebf7170c826430ca16665f
font_02_sfnt_off00010cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAD 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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