Malicious PDF — malware analysis report

Static analysis result for SHA-256 9add6b4604e2667b…

MALICIOUS

PDF

71.5 KB Created: 2021-02-26 08:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c835d718f4246efb24175db1bebbd9e0 SHA-1: c574821708671dcf7f219bec9460c812eb3e9e93 SHA-256: 9add6b4604e2667ba9aa64ca15ac61c12c288ef9792ea4f76553d061c1138b1b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document body and embedded artifacts contain numerous URLs pointing to disposable domains and link farms, suggesting a phishing lure or a mechanism to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of disposable hosting and UTM parameters, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=what+time+of+day+should+i+whiten+my+teeth PDF link annotation
    • http://yoptan.space/sujavetewilifikedemzwdz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_60269bdfa1831.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/systems_engineering_jobs_tucson.pdfIn PDF document text
    • http://thefortykuti.com/puzapagecxtfn.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/IXicThi/92446679568.pdfIn PDF document text
    • http://power-guard.shop/sql_developer_export_date_format_excelgrv9y.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/2aBFrZ0/among_us_100_impostor_cheat_trick_tips_kills.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/4ighehd/3238481081.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/mojivikapeti/govefedumifa.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/68959002725.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/how_to_replace_golf_buddy_voice_2_battery.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/fegase.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/petiputedam.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/certificato_di_conformit_auto_gratis.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_off0000db69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB69 5256 bytes
SHA-256: db0743d9f9fd0f3c256b2baf9d2741990a24afa249b2dd424cfb519bc407ed49
font_01_sfnt_off0000ed4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4B 10660 bytes
SHA-256: c976c38b5adf977664b320b282a9e6a457b9cded86a0ff0cc7b4ed3f7b1f12d0

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