Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ea639f8bb8f901…

MALICIOUS

PDF

63.2 KB Created: 2020-12-04 17:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 598b1eb154fdc839de0fae15cfc22746 SHA-1: d544ce722a0d4bff2cf5f4c0e8834b7290dde1bf SHA-256: 62ea639f8bb8f901f5d3d8100c22704d961ecacf15d36af6464de0e53277d668
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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.
  • 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://traffine.ru/strik?utm_term=towanda+daily+review+archives PDF link annotation
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/2499678.pdfIn PDF document text
    • https://wilunozuwi.weebly.com/uploads/1/3/4/4/134432110/3941521.pdfIn PDF document text
    • https://turetufifej.weebly.com/uploads/1/3/4/5/134500159/nenuzo-ronizubolewux-pilog-ziwugalif.pdfIn PDF document text
    • https://redupasatoli.weebly.com/uploads/1/3/4/4/134446027/4340712.pdfIn PDF document text
    • https://kuvinonufero.weebly.com/uploads/1/3/4/3/134307364/6769529.pdfIn PDF document text
    • https://xesapexoxes.weebly.com/uploads/1/3/4/6/134633169/889bb90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc94edaa-560c-4151-aaf8-ef19e552eaaf/tobubov.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56bb527a199023ad3bb59/t/5fc6bbf17995075abdcb5532/1606859767867/the_walking_dead_season_1_episode_1_watch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf55e4f81c9a2a0c990ad4/1606374884918/xewubojitowuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/075c0de5-7d13-4e54-948e-0d61c2abac03/trabajos_en_cartulina_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1c4038-215f-4c32-bec5-d4372464b0f4/lg_apk_google_bypass_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18dc424b06a7eb303d081/t/5fc3976ccb3e0f5771be920c/1606653804895/work_worksheet_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f98141-f6cf-46b4-afdf-78208c1dad36/72772756440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93067d5-ca41-4de4-b2b2-a7615f5dd0fa/mazononexixesopu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6c4e5c7695ca99bf722/t/5fc37a839ee0f32b87bff4bb/1606646403808/xukaxotone.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_off0000b98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB98A 5232 bytes
SHA-256: c55d624ec0c2c02866f5b01182512724a04e4e4ecf0d87f6e63773f3a8e8735d
font_01_sfnt_off0000cb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB66 10764 bytes
SHA-256: 21ac47a5f202b6fe846ad292cb77cc4f3303d2d0dced177e8a365d51673f1b2c

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