Malicious PDF — malware analysis report

Static analysis result for SHA-256 d434efff25d1e2c9…

MALICIOUS

PDF

64.8 KB Created: 2020-11-13 21:24:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 18ed0c68839b8abc2ef116363dd74348 SHA-1: ef37c8e3b589d28796de642a4d42880d06fa1d4e SHA-256: d434efff25d1e2c9e71decbe9e8ed02e3a73b7650393921078a7516551043e26
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'trafffi.ru', suggesting a potential phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

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://trafffi.ru/strik?utm_term=2007+honda+odyssey+manual PDF link annotation
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/835811.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/2c1c73aad3f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f87b8aa7056f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5fa00c73b0bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5fa4638f7b81a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5f8a232a57628.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/0cabadbb-3b4a-4f35-84bb-9ac63d2bb513/zilumawupuxusexexix.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/ruxusususefusixogat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea29d67d-a458-47cf-9459-8b63ce88a188/xutudaredavavidupokurobo.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/rodeos_in_virginia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcde3e9b-3a81-48ab-812c-02707385d8f0/lafaril.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3edaa15-d3cd-4fe2-9915-46eb895216fd/rovuxaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9155e29-bcff-4015-aaca-27e7ff4c4e44/kedenite.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/backus_pine_river_school_district.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_off0000c2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E4 5328 bytes
SHA-256: 4ce823e1b75a5ecf63371681f4ebe0ce81369a9cdbc586dad3cfe21ac81c8d06
font_01_sfnt_off0000d4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E7 9804 bytes
SHA-256: e97975114a195ec5030dfae90574aedc294569e21eda96817d1a5bed92e92e88

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