Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ce313e67d20873…

MALICIOUS

PDF

77.8 KB Created: 2020-11-25 18:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e8568f5a08958964aed4a5f558a71de SHA-1: 27213727d121c2a926e8dcba2935dc4c4c344154 SHA-256: 55ce313e67d20873ef7b71f03588f8625d46fe273cdc655de051d691257a71cc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=call+of+duty+warzone+trick+shots PDF link annotation
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/porakidikekekexaxu.pdfIn PDF document text
    • https://sawanizoso.weebly.com/uploads/1/3/4/6/134654845/betitenevod_tadejev.pdfIn PDF document text
    • https://luriwopowilexat.weebly.com/uploads/1/3/4/3/134338936/zepitojipep_pibozemixedi_xexenokanub_falezovexodu.pdfIn PDF document text
    • https://gozarijaleb.weebly.com/uploads/1/3/4/3/134337750/pitixapiwiwom-gabirijeso-tigebubesam-sijigenadewebol.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/gowokefisoxenu_nigirozufekagok_wenujojuxas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_5f9c00fc61088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5fbe263481156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_5fa758c41cd65.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/965887da-95a1-420a-b71b-92952bbc6231/94722079491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8906196b-e3ad-4915-82c3-3d035085d801/riwikifog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80cf007b-ad25-42af-96a8-ecebf2a62b13/51057646657.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_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 5320 bytes
SHA-256: 757515b2b84240b5e95361614089a1968615889d05587751772fc5d5b6d24167
font_01_sfnt_off000103dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DC 11352 bytes
SHA-256: e21f36c54ec0461bfddcaae5bc93363f3eb31caacadeb109b105e1bf3dfc9417

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