Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9a7bbe0ec51148…

MALICIOUS

PDF

74.1 KB Created: 2021-01-06 15:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7cbd39b39ec5eadc17f81f84c70a1023 SHA-1: 4d8d1ef42b94bef4d5b314903e894ec3507ba874 SHA-256: 6b9a7bbe0ec51148b7b621081d47c4e24ce6267d5a9c197bda02aa8f6d4bb549
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure and SEO link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lead users to harmful sites.

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
  • 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 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.
  • 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.
  • 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://traffine.ru/aws?utm_term=axa+world+funds+excess+reportable+income In PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/b288b48164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407729/normal_5fd85c37134b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466165/normal_5ff45589b77d0.pdfIn PDF document text
    • https://tilobumofiraji.weebly.com/uploads/1/3/4/4/134492377/kinaduwogaguligalene.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/wotodedaruzuk/precal_domain_of_a_function_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/41075775354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6f262a-76bd-451a-85d9-742ab0b13fd7/gelezesefosekozatexodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c99f882-baa3-4203-b36c-eff51211440c/80597318173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261a23c9-3745-4c22-8f90-5514527908b0/fender_american_deluxe_jazz_bass_vs_elite.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/best_award_show_music_performances.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/adjective_worksheets_for_grade_7_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/love_yourself_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/borejulutatuzulamobetudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176720d6-c723-4ba6-8ee0-ea446552cb1f/pabefigowuposudu.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/rojobezamegurilekarijo.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_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 5592 bytes
SHA-256: aa54fe0dec6130f0016f0a9a911c6dcf80d6eb19bae310a487f137645816292a
font_01_sfnt_off0000f53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53E 11096 bytes
SHA-256: 881177177417512025ae0b3a3a52e653d3d2e8b884526bdee8f176eceeadea6e

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