Malicious PDF — malware analysis report

Static analysis result for SHA-256 36256312aec2eac9…

MALICIOUS

PDF

66.5 KB Created: 2020-11-19 01:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ece2d7672e3891b7eaee9da3e83389a9 SHA-1: 4531901c27f5132bc7f5b7054fc1cabc2648f624 SHA-256: 36256312aec2eac9a696d6dc84cea4c7e60386e56cfe3b6b42366c272f107bca
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The presence of a large number of external links, including a link farm, suggests a tactic to distribute malicious content or manipulate search engine results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan 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
  • 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.
  • 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://cctraff.ru/123?utm_term=se+asia+city+model+definition+ap+human+geography In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376127/normal_5f91e9c621c61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480389/normal_5fada9b513a34.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/7e5304.pdfIn PDF document text
    • https://kukevukoleguko.weebly.com/uploads/1/3/4/2/134265740/fapirimipogeb-binew-xoxukilebapebu-soxedifub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f8ce82fa85f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f885bfb4ae34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_5fa820a9178df.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/512cfe2c-eb3b-4a65-a725-64b16567ca8f/sapinivafifuzaziverudax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0a9c70-66ee-4d2f-9bae-3cc56a0e56bb/99792600277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a29f5eba-a9f5-44e3-bf72-cc12cb71c002/mosawekaxerobejebazibaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1a71ce-cbf8-4e78-8c59-ac80543bfe21/nururedodoluj.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_off0000c804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC804 5776 bytes
SHA-256: f645dcb6ec127f0656dca885a453dd5eeaca73b49c42f5bbde14cc85143b3602
font_01_sfnt_off0000db8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8B 9772 bytes
SHA-256: a1367dc003f8907da6a33f55cbd8f09e2d3887d7fa3e771f1f711c3b3a3f9a22

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