Malicious PDF — malware analysis report

Static analysis result for SHA-256 8328a0b89c24e9d4…

MALICIOUS

PDF

84.7 KB Created: 2021-01-10 10:04:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 372ed186d1fbe198d3c6462c4e33bc35 SHA-1: 90adb91875142a27a534c5b17e2d8c9cfc8e0dc0 SHA-256: 8328a0b89c24e9d45dfae4936c6f9c8b99ce6ed0dc10be874d36dafcedab54d2
214 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 URLs, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute malicious content or engage in phishing. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/aws?utm_term=adivasi+gana+sanjay+kirade+video In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_5fd7e00a46523.pdfIn PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/gapinixejelezif-mumafupege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384150/normal_5fc93eede8b4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450419/normal_5ffa45124d587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5fbe9d0f15f1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_5fb31e34c53f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_5fd2d33965af3.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/zowejunef/57510408936.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_off00010f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2B 5252 bytes
SHA-256: ec87ad32adee216ee91f5c675463eb753bfa0bd4bd6a218e194ad9dff5eb4455
font_01_sfnt_off00012131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12131 11580 bytes
SHA-256: 77d029c9cd541e3c359e4a5e8cf1d2ef196663f901eb7d541af4fe0234ad20be

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