Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fd218c2baeab4c…

MALICIOUS

PDF

73.6 KB Created: 2020-11-19 02:30:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b6395b69598d868cb5cbef6b2edc0ee8 SHA-1: d67c5e4a69a7e54ac9383116fb7300f93d0462de SHA-256: 99fd218c2baeab4cf99d88328b4a7da5b9dbf7bed8b80ff36595f6e879e4e2d2
196 Risk Score

Malware Insights

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

The PDF contains a lure suggesting changes to payment or bank instructions, a common tactic in business email compromise attacks. It also includes numerous external links, with one pointing to 'trafffe.ru', indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://trafffe.ru/strik?utm_term=hack+drag+racing+4x4+android PDF link annotation
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/1930766.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/25caa.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/6b7cbc659827e09.pdfIn PDF document text
    • https://dexetejitifite.weebly.com/uploads/1/3/4/5/134576896/tisad_fovol.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/gipij.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/af0ebca0-7845-4c8b-b1ef-fd5c912408c5/9964439763.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/vorixix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d93463-e6d4-4c98-ae11-e9f88df741eb/the_cranberries_zombie_mp3_download_skull.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/tom_buchanan_quotes_about_daisy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72800483-f9fb-499e-b1bb-4e33dc8f54db/53567041597.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_off0000e29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29C 5080 bytes
SHA-256: f90747af8e1c2084d5c94f511c43f2c3de50e8f82f5a6de30e2a6c3e019fd5d5
font_01_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 11068 bytes
SHA-256: b9e1e760937034aec54ff70cf548931f8a92ca890d6895bcfa289fb953537352

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