Malicious PDF — malware analysis report

Static analysis result for SHA-256 db15149c2b87da17…

MALICIOUS

PDF

67.2 KB Created: 2020-11-18 09:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 872425149f65ca636fce7525f2aeab65 SHA-1: 17be1801e9148be6d2895ed9cfe6880ce73d932c SHA-256: db15149c2b87da17ad81bbf69a280c90cf875c99ec197ad65de3cfbec3c9d797
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document and hosts a large number of external links, likely for SEO manipulation or to distribute malware. The embedded URL points to a domain associated with malicious activity, and the document body, though partially corrupted, suggests a lure for downloading software. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://traffset.ru/strik?utm_term=halo+reach+for+pc+free+download+full+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407994/normal_5fb013fa85517.pdfIn PDF document text
    • https://vumusubivabup.weebly.com/uploads/1/3/4/4/134491869/3640892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407724/normal_5fa1a948cd5c2.pdfIn PDF document text
    • https://judezirebesos.weebly.com/uploads/1/3/4/6/134669344/0d72d55f16572.pdfIn PDF document text
    • https://fiduwovizeget.weebly.com/uploads/1/3/4/5/134517619/kasigeba.pdfIn PDF document text
    • https://wisizexabebaj.weebly.com/uploads/1/3/4/4/134461468/lewewonibewofav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce07b1ee-fa9e-46f4-a544-85f7a88dc6b0/lebikirevuzujonitujuvakip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bea3338-5e8b-4701-820f-b32cdd2ab54d/jatobiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0ec3dd-a3e9-4557-9b19-5b049cf633fc/49221129756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae763460-bed0-439d-9117-2b9fa2e51d60/38664638672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c178d356-7806-4df2-8ae3-10dbddcec621/3_forms_of_verb_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53b19439-69e6-489d-9bf1-c7b1afaade55/51532501665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0634cc8-5ff0-4916-b200-aa36bf6764db/dosexomujurukililenem.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_off0000cc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC66 5356 bytes
SHA-256: 70b30db22554d4b8e1d3425c7c24dc65ead697d8a108db6c7f8350ab5a20c59f
font_01_sfnt_off0000deb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB1 9988 bytes
SHA-256: e71f7e4b351a54d1a2ae21431fbebb4ec62abb1a0e055b260cd1336e385e47f8

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