Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b31d5804462b09…

MALICIOUS

PDF

65.8 KB Created: 2020-11-25 12:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dd9dedf14dcbbbda9600436877e31c11 SHA-1: edf70e43083d21be61cdbe78eb1db9aebf3b6393 SHA-256: 10b31d5804462b09b76b00ccb613588acc1e20fa2977caa144fb27e58f6de229
156 Risk Score

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-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://traffine.ru/strik?utm_term=dark+phoenix+123movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f91421cbd72c.pdfIn PDF document text
    • https://gadevonetikob.weebly.com/uploads/1/3/4/3/134358307/jarufuvowebe-wafajote-fanipuba-junopakituk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424040/normal_5fa1b06f33f4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5f9070d1f1040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f9351941a094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403673/normal_5f9d6fc6b2fa5.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/jojitagifuva/24572862418.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/tcc_pesquisa_bibliografica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929d345e-d90c-4e33-b9d9-a54714c7baf6/mechanical_hound_in_fahrenheit_451.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/apprendre_l_allemand_pour_dbutant_gratuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f4a136-d422-4757-a88e-fec5a3a07945/togofotip.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/varisia_map.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_off0000c1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EA 5568 bytes
SHA-256: a87fa311e0278d64cde91929322dfe2520f467b824a307e4bab6e984a546a05d
font_01_sfnt_off0000d4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C1 11092 bytes
SHA-256: 184363792babdfd03b5cc1ee911df69bc563687d6dee0c55b6e345e58fe0af69