Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc995de1edf14b8…

MALICIOUS

PDF

65.5 KB Created: 2020-11-09 18:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 171b932aad6bd03ba915997d9dfdf445 SHA-1: 3dab2f0f2a1b42849834c386124534f764797411 SHA-256: 9fc995de1edf14b8f485e11d83be102bbc635cb2ddb5c0cbfbf5e5bdcd7d4843
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URL, pointing to a URL that appears to be a lure for fake driver's license information. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to the lure, and the PDF structure includes numerous external links, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/strik?keyword=fake+drivers+license+seized+in+chicago PDF link annotation
    • https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/vizisexazup.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/raxisimunobejalakezi.pdfIn PDF document text
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/lawemudazatiga.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/toliwudalamem/34218642907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51dce50e-5709-4105-a229-f689fcf3fb4e/voguwolezizosadanimubajex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1877049-9d8e-49a1-a7c0-614f71489673/rabidekaruvusakizagaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/online_pid_tuning_simulator.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/lumico_life_insurance_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e541b2-1584-4fe8-80e3-d94bd9d3016b/29483959683.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/tofedijozi.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_off0000c501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC501 5328 bytes
SHA-256: ff2d0c5bb9a5bc22f5117fb0c41c84176b0293be3e0464474dafeaa8bfe813f7
font_01_sfnt_off0000d731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD731 10120 bytes
SHA-256: 84e3b3982610bc211eb9bf47e08bbb92efa535a9b35f45fe3533a8d0ab77cd91

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