Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f77e7b8220880c…

MALICIOUS

PDF

73.7 KB Created: 2021-01-08 17:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 13e24b74d483c1531a05cbeeea131436 SHA-1: cb752ab8338ad6e98ee0d8afa37896801be99c0a SHA-256: 13f77e7b8220880c61c83f95f8202fcc9b45922f20a6d8e68b74206ca34b3333
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL leading to 'traffset.ru' disguised as a game guide. This suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or a trojan.

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://traffset.ru/aws?utm_term=alchemical+hydra+guide+osrs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8f2ba76ea6c.pdfIn PDF document text
    • https://gizisojanixagep.weebly.com/uploads/1/3/4/4/134495782/faxujezuxaginisuf.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/fhbjgJO/27419611828.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7971455.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/vukumesoj/3974435718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cba39e2-4f7e-4b17-b65f-03edf6727e8d/sigma_1200_plus_bike_computer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd303e72-cc60-4283-b8ca-78f3fa800883/spirit_runeword_flail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35770617-e129-4522-9188-e848fa02f9d9/tifadinemowuwodur.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/63903688642.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/30386965640.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/guidelines_for_infant_passport_photo.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_off0000e18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18C 5444 bytes
SHA-256: dc16aa71ea1da219bb3c515589c04c24a7fb34fb83ae1772bb0b6172008133b3
font_01_sfnt_off0000f3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E7 11532 bytes
SHA-256: 2e9484d18db8d12f445219bfc62a707903f8b0db98c207db71f80ece65a9db43