Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f9ef2498fe167e…

MALICIOUS

PDF

75.6 KB Created: 2021-02-28 12:15:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8f7c68ebbb6c621b004214966c75ede8 SHA-1: 9514cd4a9dfa3a4bfc1851f6ad459d8deeef8667 SHA-256: 89f9ef2498fe167edad0290b62dfbf49746173b3f802f153472768b5590be447
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/strik?utm_term=obituary+common+sense+printed+london+times PDF link annotation
    • http://bimolomazija.22web.org/3x3_cfop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5fddea08dad85.pdfIn PDF document text
    • http://nokutanebufevon.iblogger.org/mens_euro_shoe_size_guide.pdfIn PDF document text
    • http://guvetosufawi.22web.org/the_monkey_king_havoc_in_heavens_palace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488815/normal_60149399db721.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5fe276a73e324.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/hgjgEhh/pivitisa.pdfIn PDF document text
    • http://futegejetebe.22web.org/fejajobaguweruroneso.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/hg3y5hd/trivia_game_show_name_generator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guvewenif.epizy.com/37193267261.pdfIn PDF document text
    • http://zemadepa.rf.gd/teddy_dreams_and_nightmares.pdfIn PDF document text
    • http://duvuxosejoxogu.rf.gd/how_to_reset_a_digital_bathroom_scale.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 5488 bytes
SHA-256: 06fdcf30ccfce4df985a763b2815df5c7286f0a63ed0d44bff8a8798789b17de
font_01_sfnt_off0000ff60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 10048 bytes
SHA-256: 4b6a48f51dd43b473a7f492fa7045f3ca23cf521034b9cdb406b970c0e1b9dd4

Open this report in the interactive analyzer, or submit your own file for analysis.