Malicious PDF — malware analysis report

Static analysis result for SHA-256 7267f1786bcd9a71…

MALICIOUS

PDF

66.0 KB Created: 2020-11-17 01:03:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8fe542ed0122c3c793cdf7d338096d85 SHA-1: d202cc579cdd20d641c50e1f7c3c7cc8ffa06947 SHA-256: 7267f1786bcd9a7171c3e0eb3655e77cc21a925c2d25d07a5811a7e7b0a0e6f8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier flagging indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

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=how+to+uninstall+ansys+license+manager PDF link annotation
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/xamojijasubo.pdfIn PDF document text
    • https://pagogaxuzogujo.weebly.com/uploads/1/3/3/9/133997845/6354837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417403/normal_5f96740295a53.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/9394209.pdfIn PDF document text
    • https://basalulonow.weebly.com/uploads/1/3/4/6/134612360/xidenotekidirosuro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5f903a84a157f.pdfIn PDF document text
    • https://rafunukogavukuj.weebly.com/uploads/1/3/3/9/133999746/zimuxugejakepi.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/990c3edc-86cf-4dd7-ba3b-13a1bbf44c54/32323038479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3524cc81-ab30-4ae0-860d-81da38699209/gebajivusemuninamexab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19428e6c-2d71-4f6f-8841-a451fa3014b1/75054057682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e1b35c-18cc-46b7-a3c0-f3c2abbaf6d3/robux_gerador_nenhuma_verificao_hu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9940e3-59a3-4ed8-9a84-6f5a4ac9225f/jadokujobif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bca63b9-7546-4923-8dcc-3e7fe97ec235/179134684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda9fdc7-eee7-4555-b307-9b63036428f1/restaurant_opening_and_closing_dutie.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_off0000c425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC425 5272 bytes
SHA-256: 82cd4278c111665eeaac1751f586af2d9a0cb2ff4acc3850e1bbeadc3550f98b
font_01_sfnt_off0000d613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD613 11116 bytes
SHA-256: 0e177cd2f932ba65fddb9d72dc7625cf697128c1a91f88292465cc3a12b150df

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