Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b689db797306fd…

MALICIOUS

PDF

69.4 KB Created: 2021-02-13 02:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: be736ca062e60176a57c6b81145f45a6 SHA-1: 847fa9f0b52791546edc8f0bb44405d38d4abb91 SHA-256: 22b689db797306fdaf34532ebd44e203317c01932708195549ab0c90c861723e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and the 'link farm' heuristic strongly suggest this document is part of a phishing or malware distribution campaign.

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/123?utm_term=please+don%2527t+say+you+love+me PDF link annotation
    • https://cdn.sqhk.co/pafevola/cBhgFhg/rarirufixigijajepe.pdfIn PDF document text
    • http://fiwamixos.iblogger.org/frmacos_antiemticos.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/gghjQii/noel_arenado_contract.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/hdyiegj/download_game_warship_battle_mod_apk_unlimited_money.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459796/normal_5fc88f13b5790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495558/normal_5ff653e12261c.pdfIn PDF document text
    • https://guxuxexor.weebly.com/uploads/1/3/0/7/130775085/wofixabazezedogoki.pdfIn PDF document text
    • https://tesegedoveveda.weebly.com/uploads/1/3/4/8/134891870/telosejekexokisip.pdfIn PDF document text
    • https://notojusuwetu.weebly.com/uploads/1/3/1/8/131871856/5d085673f5.pdfIn PDF document text
    • http://loveantravel.xyz/859807455660w3eh.pdfIn PDF document text
    • http://govakokes.22web.org/tutixes.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/73013422751xazi5.pdfIn PDF document text
    • http://workbykoder.xyz/79476459278k8l1a.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/ShbiiDa/lewoko.pdfIn PDF document text
    • https://bafupenog.weebly.com/uploads/1/3/4/1/134131575/pobujawisuvep_vorufaxu_mivediwizezow_kenati.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wefefamerimido.rf.gd/63115738939.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/autopsy_report_template_google_docs.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_off0000d1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B4 5072 bytes
SHA-256: e32b219530062f064d951518bd234e895df6ac645e8a6e4a766a23d0d5bb25e1
font_01_sfnt_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 11216 bytes
SHA-256: 7850e6916096cadb1679a7835c96e28f010bf3825f2c055b089f78ebba3b74fb

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