Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c022d229453614…

MALICIOUS

PDF

68.9 KB Created: 2020-11-10 06:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6c261b8aeb8adb3d380315f517abdbbc SHA-1: cee44f347a8d9bd3ff8d232a927242b55f6e1474 SHA-256: 39c022d229453614324a5be7c878c0595e06f3994afa1b88ed7c8bab28d61438
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector and a link farm. It contains numerous embedded URLs, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Murder on the Orient Express', likely intended to deceive users into clicking malicious links for SEO manipulation or phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/strik?keyword=murder+on+the+orient+express+pdf+book In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376127/normal_5f8d4c33ca7c6.pdfIn PDF document text
    • https://vuvofazomegudej.weebly.com/uploads/1/3/4/3/134329778/giwiralefo_kuzetot.pdfIn PDF document text
    • https://vorabatuzawudun.weebly.com/uploads/1/3/4/5/134582038/a4a1903bab60b.pdfIn PDF document text
    • https://guvapokasek.weebly.com/uploads/1/3/4/4/134437462/kapufisaboka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_5f91ee162982d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f8899c77b9bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473963/normal_5fa4414448aa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_5f8eab82e1233.pdfIn PDF document text
    • https://mivoxoxez.weebly.com/uploads/1/3/4/3/134340481/vumasipif.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/7335079.pdfIn PDF document text
    • https://nobaditidiz.weebly.com/uploads/1/3/4/2/134235496/86170.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/guzesotew_mepoxilazin.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/0f8c843b-e629-4c21-96b9-8bc10d4c524d/85304888522.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/kekawesokoko.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/proform_crosswalk_395_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3b326b-4610-46cf-8520-21586b8906da/87615366809.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_off0000d30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30C 5164 bytes
SHA-256: eff5439c7b0169969d878f4d125d5c6f4e5dee36b37a4028f086a90ea40cce4f
font_01_sfnt_off0000e4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A3 9828 bytes
SHA-256: 7a5736d006b5470b88e600f4826cde30f6371fa3e04c3069f50b7b2f51fcf03f

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