Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c63c8f92db7f17…

MALICIOUS

PDF

65.9 KB Created: 2020-11-14 20:19:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5d2e52fa94c76d7208e6504ed5e1a298 SHA-1: 1db29059ebfd2b32a3ac137433b31191bb9a6530 SHA-256: e7c63c8f92db7f17815bdd7b2e8c3ff0c0519fdcb4695d6c0f69c0dd91540334
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with numerous external links, including one to 'traffset.ru', suggesting a phishing or ad-revenue generation scheme. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=photo+background+free+s+software PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393916/normal_5f9f823c17dc5.pdfIn PDF document text
    • https://sekulawovow.weebly.com/uploads/1/3/4/5/134578441/493898.pdfIn PDF document text
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/2685067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5f8cf93228ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_5f93945d7ae2a.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/xipavir/2131672533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35baea0e-1a97-40ff-aa8d-6faf22b5b1c5/poesia_de_despedida_para_sexto_grado.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/govupew.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/33167719253.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/37355524961.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/6300017903.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_off0000c46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46A 5548 bytes
SHA-256: a5ab5dd42c5b85fb7227f294da29e8ea2de310529c6c6ff26eb3a7be1a22d589
font_01_sfnt_off0000d756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD756 10516 bytes
SHA-256: def76b775c3a0aada924bb4b71372cb95514a4346cd0a895f8563f14cfc057f7