Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1f7487c5b22406…

MALICIOUS

PDF

70.9 KB Created: 2020-12-21 01:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5ddb3c40939a8bece58c23ece5d7d097 SHA-1: bb0301f0798e5d53ba147df89f3826d4f5730baa SHA-256: 0e1f7487c5b22406a17f6d46e09087862dcfb22d27b34181f941b8d7d1a0ca01
154 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to be a lure for 'free frying pans'. The ML classifier and ClamAV detection further support the malicious nature of this file. No scripts were extracted, but the primary attack vector is the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=safe+stick+free+frying+pans In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f89f072560d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461250/normal_5fc7266621c1d.pdfIn PDF document text
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/rigixakexavag_nanugepivuwixug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_5fd1c2fe095ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375514/normal_5fb775cd8b675.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/fofeguj/8801910014.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/abraham_joshua_heschel_the_prophets.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/babylon_mystery_religion_ancient_and_modern.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf268951089318d83ee97c/t/5fdf9cf8e64f570315422317/1608490232418/blue_bells_school_delhi_admission_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/soccer_goalkeeper_training_the_comprehensive_guide.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_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 5420 bytes
SHA-256: 7300214556c9956a1bb9e0669cb165026a16ef5e188bf08cab2cc7b45d6df64f
font_01_sfnt_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 10416 bytes
SHA-256: 7a6177ffc6067b9b89aea0763e2818b3d7efa2edc7c681b48cf2ce8debcbdb2a

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