Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eedb63bb9bb3a40…

MALICIOUS

PDF

74.1 KB Created: 2021-02-21 22:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 04c6aa07148625e78b2301909363daf2 SHA-1: 1209f20154f7708a756c3c0f12246793861ce25f SHA-256: 5eedb63bb9bb3a40a2c2cc751be0c8be0e5789a347e4cfa33f483723eda2043c
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=starts+with+i+word+whizzle+answers+wide PDF link annotation
    • https://cdn.sqhk.co/xenekifa/ijCgdCH/80494613367.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/DO7WjeJ/fetepirejabitigujozir.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/sEpTjjL/stickman_revenge_2_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/gKjdKgc/chinese_drama_2020_fantasy.pdfIn PDF document text
    • http://myfavoritesun.xyz/204775274308c256.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/3vha5hf/serena_safari_caller_tune.pdfIn PDF document text
    • http://itravelimpressions.com/what_are_the_12_step_program_for_addiction07kq8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481170/normal_6021f785b2611.pdfIn PDF document text
    • http://sevastopol.sale/tolijenufopujorijfgjrs.pdfIn PDF document text
    • http://qiwi-wallet.online/391130051968u7qb.pdfIn PDF document text
    • http://megatorg.ru/zisukopasofajuruofp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448545/normal_5fed927473b8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475588/normal_600505f57f54a.pdfIn PDF document text
    • http://trylait.club/gejumo4w8gs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_6029462274bf1.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/fuvidokibet/86574691701.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_off0000e5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D4 5160 bytes
SHA-256: ee4a824dcfefe8356c27d9bf6aa649d438f71629c551385c1b2477445652dc2e
font_01_sfnt_off0000f76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76E 10608 bytes
SHA-256: 7aecf22bbf08a2ac209328c69347effad36f1386aebdf47bd13006be282d1287

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