Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dca7ceb96a8f9b6…

MALICIOUS

PDF

73.5 KB Created: 2021-01-13 10:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 973311380daa429ad8625fd8d800e4d2 SHA-1: 97701bfa2718252bd9a4c884f0ebb1f0dc3fd7eb SHA-256: 1dca7ceb96a8f9b6c0dca1a389bfd4f2dd11f04ab802c62f50fba6b7bd001404
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 link to a known malicious redirector, disguised with a search query for 'Skyrim mods spell research'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the embedded URL is the primary indicator of a phishing or redirection attack.

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/123?utm_term=skyrim+mods+spell+research In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_5fa486ed472ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5fa3a87a590b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_5f994bbc99077.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/iegihbv/friend_finder_iphone_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5f9b2c43a7897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_5f99b4d8309fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f8727fd147f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387036/normal_5ffa861ab91ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5f94ffcecfd31.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/zoxewudunigus/easter_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/22866309675.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/chani_project_transcript.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/how_to_keep_your_volkswagen_alive_torrented.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_off0000dbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBE 5580 bytes
SHA-256: dc0056c132106a8c12eee1ff2815054671116f85e75fc0cb1fff3a4074c33090
font_01_sfnt_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 13492 bytes
SHA-256: 1be7f3fe8e59db0fdd6fde7d8670e7d1650a5b0aa600fcc9eb523e1d4e5fce30

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