Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6e595c060189aa…

MALICIOUS

PDF

72.6 KB Created: 2020-12-28 20:26:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a24cfa60dc9a730a79f3d67f0651ef5d SHA-1: 130c1eb04efcff79c028930034c593a2a321ce9c SHA-256: 7f6e595c060189aa8728031b138f718730cef7c2fc6915eaf53d4f8fcf20bba4
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 large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm, suggesting the document's primary purpose is to drive traffic to external sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=absolute+rc+plane+simulator+apk+cracked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408188/normal_5fa60e2eb0ab9.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/9345559.pdfIn PDF document text
    • https://cdn.sqhk.co/ledumixifer/Xgejajb/19660243926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f8a7669c3a7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464730/normal_5fe269a335008.pdfIn PDF document text
    • https://kelipibefis.weebly.com/uploads/1/3/4/5/134500531/3944379.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/1b737ddf-e6ac-4d1b-acc0-9c43f1da3efe/80820705478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb683085-3827-45b3-81c9-85aa1cc4785d/wedibamigika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef86206-cd5d-4ed4-a683-c03f41ff1c7b/nusobelemawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76513748-258c-4fa9-8fcd-4862974141e4/30118182243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6d9f56-1420-4cf0-8f61-85ae47613411/nidizubulure.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD42 3512 bytes
SHA-256: 30e485cb86ac83a98b3b120ce6a210468446f09f063615486a115faceb361495
font_01_sfnt_off0000d9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CA 5412 bytes
SHA-256: 430c3a48bfd4406cf9a87802f346d3081cf23cb123314413cf5a153dba07c347
font_02_sfnt_off0000ec0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0D 11916 bytes
SHA-256: caf4a4c0fb975ba761c8c1084998b6fd87ab9e783020da058b48d90b6a7d39e3

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