Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9c4f20fb4b26ab…

MALICIOUS

PDF

66.9 KB Created: 2020-11-14 03:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 73a8694e599e222262ff88d5d76be0a7 SHA-1: 9a62625ebe50b19aeb4ee3edcec86166beee703a SHA-256: 0a9c4f20fb4b26ab23d3bf2a8629b425e7bac185de74925ca5a7ff8d544836d1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link disguised as an apprenticeship opportunity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/aws?utm_term=information+systems+business+analyst+apprenticeship In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446937/normal_5fa80588b362e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450638/normal_5f9ff72ed8562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f9860897b078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5f9691ea58a12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f9313d2a39e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382782/normal_5f913a6ba4bc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_5f9cd9b440933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5fad4bd1b311c.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/fodose/lebiwulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/266a1a73-6b69-4327-a6ed-b854cc61c0fd/rexufukofuxopav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98354539-341d-442c-a29c-84a49120181a/88397640016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f10a50-c2f1-4a0e-88fa-5ad9eaf789da/vomusuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3b5c34-cfaf-49c1-b724-486454abf471/zoology_lab_manual_class_12_hsslive.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_off0000c866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC866 5432 bytes
SHA-256: e28e23ba2f9807fb86e5c0a91cc07b1eb4f3cbe608d4f32bdc5617252341b063
font_01_sfnt_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 10564 bytes
SHA-256: f9cd58eadb3549de305115a97b48712ec0d540eb1dc952132443c3a18c5e6ad6

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