Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa3192c001b49f2…

MALICIOUS

PDF

66.5 KB Created: 2021-02-15 07:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6f6653a09adbfa97729528a8da84f69e SHA-1: 27e291a2b1ac854e8d0a74c0ed0525b79b03444d SHA-256: ffa3192c001b49f22b68fa9085f9905f3aca53dc69ee063a7f4262d8abbbde17
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, suggesting a phishing or SEO poisoning attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful websites.

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://bologen.ru/aws?utm_term=macy%2527+s+twin+sheets+sale PDF link annotation
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/matuvabuduje.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/hjEzIhj/wawasowojegixawunite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460688/normal_5fee3e02214de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_5fd067c912024.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386824/normal_5ffa0193368f5.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/NHE7hf2/petujomejabunavofad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497685/normal_601ef6194389b.pdfIn PDF document text
    • https://cdn.sqhk.co/doxanusubomo/WligidO/lost_frontier_menu.pdfIn PDF document text
    • https://jinitemolo.weebly.com/uploads/1/3/1/8/131856214/sitatoko_botaxiviz_belizader_gavagimitel.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/ajbehgh/34110366937.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/afUHjig/setojorodonezazogugoze.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/tidigudetefumof/67909284773.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/sundari_penne_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/seismic_performance_of_exoskeleton_structures.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_off0000c885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC885 5024 bytes
SHA-256: 1e058b222d304f590baf1afc596caaff653d64c3e5fd1d716c271f85881666aa
font_01_sfnt_off0000d9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C5 10440 bytes
SHA-256: 20e51129ab91aacc84ac2a48b796f5d0a0e53d6b908673324dc63626f29316ae

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