Malicious PDF — malware analysis report

Static analysis result for SHA-256 817d6e265af57862…

MALICIOUS

PDF

60.7 KB Created: 2020-11-30 19:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1c30d2e126f69adf419d52c33fc21243 SHA-1: b79a8c38add0f1f20693426a8fbdcb0de02bddf4 SHA-256: 817d6e265af578629b4e3c983f5d6d2ab25f6827bedb584746c7ed1a1120912b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/strik?utm_term=unit+3+genetics+review+sheet+answer+key In PDF document text
    • https://pirowefe.weebly.com/uploads/1/3/4/4/134444143/genilekob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455178/normal_5fa2ed3ba446d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5faf9a40d446c.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/xawemefezepime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_5f8a1c0b27b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_5fa4966d1038a.pdfIn PDF document text
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/9f2a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc01ccfc14dfd36feed28e9/t/5fc11f034e98326c023823b4/1606491911138/nonfiction_graphic_organizer_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d75dd9d-f129-40c4-bb8c-ea3384bdb048/how_to_wash_collard_greens_in_the_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c541b3a2-00c7-471f-89d8-725a2323d73c/6640335536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c993cd-c637-491d-b4cf-91f5247716ee/28475135204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7042c7-1f07-46e9-adf7-e8cb9fee4304/38299476235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5c7b8e-d4e0-47fc-a3bf-e4a8b48a72ff/kipakuvakeniradasasefi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0067d334513fae4299a4/1606221928016/64234734461.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_off0000b11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB11E 5500 bytes
SHA-256: a247d0630f722164029e5abae8c52d1f076e4380bd28e51fd0c3cefe78592669
font_01_sfnt_off0000c3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F0 10076 bytes
SHA-256: 9ec5f48778ca83c47c24f1ecce0309ae2b8cac79147232e7c999e0464b4bbe99

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