Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca152b2104314b4…

MALICIOUS

PDF

69.8 KB Created: 2020-11-11 05:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 55e342ff81976eea0ad55194f40113f6 SHA-1: aeece4376a58e43604ee7f561d47d875e017a1eb SHA-256: bca152b2104314b4a0eb2338c41f220b642f6c8d2cfde167828c93bc3337b720
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a link to a known malicious redirector, https://traffine.ru/123?keyword=ccna+2+chapter+6+exam+answers, which is likely used to deliver a secondary payload or lead the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to "Ccna 2 chapter 6 exam answers" to entice clicks on the malicious URL.

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.
  • 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/123?keyword=ccna+2+chapter+6+exam+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476288/normal_5fa6a472b694e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412159/normal_5fa9ca7603cb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_5fa8775b992c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_5fa6e9fe3f304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5fa1a4f30af09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422368/normal_5f96fbe39cea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f9b3ef0af69f.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/246b8503-a4f7-42be-8a5f-0d9e2afb119b/mbt_womens_shoes_clearance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa4d6a6-1cc6-4289-9500-f384cd6cb6ee/99352171905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48fbccf2-7ea9-4d15-a14d-eaaeaf58acbb/36531938664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e2f067-ceec-471d-bfdd-c33533de2dc8/9172556937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4f3d1a-84f3-4779-b0dc-de348fb5fe2f/16407940934.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/jojewojavijexiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a4244a-1122-4b5e-909d-29095bdf60ee/gadujodosef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c2040b-89a0-47db-80d3-9df3ac5e82c1/tyrones_game_shack.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_off0000d419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD419 5492 bytes
SHA-256: c8c0f9277ee41425447ccede736ee701f3989615d0ba56c4438f1abb315f7365
font_01_sfnt_off0000e6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B2 10388 bytes
SHA-256: ae297f626c89cfeef9ed1f4285a08bec6c4839203d218ad2159005d600e0e87b

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