Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e018848065a345…

MALICIOUS

PDF

102.5 KB Created: 2021-04-13 07:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 11f817e0c99209eb17b7bbb75f337f4e SHA-1: 43794e15086caaaeef22524e515629b55713a269 SHA-256: d9e018848065a3458d342a5eeb48a2bb68c7aabe6d5150435d3c6586a36c9f79
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 0.9986

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://seumenha.ru/strik?utm_term=what+is+rationalist+theory+of+values PDF link annotation
    • http://stavki-na-sport.site/nujuzuwrmq2v.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/5988661.pdfIn PDF document text
    • https://xiridibokolu.weebly.com/uploads/1/3/1/3/131379099/wojamoworelopufuwuba.pdfIn PDF document text
    • http://am-sound.ru/37368849647a5ian.pdfIn PDF document text
    • http://lifeeuro.info/joining_the_conversationke8rb.pdfIn PDF document text
    • https://cdn.sqhk.co/vipotukivisi/gcgbqjj/65819992204.pdfIn PDF document text
    • http://instapriz.website/73115987046ywj9d.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/9d675b.pdfIn PDF document text
    • http://i-men.ru/free_bootstrap_templates_admin_dashboardoa8t2.pdfIn PDF document text
    • https://cdn.sqhk.co/lukapokobejo/icjclib/5955983295.pdfIn PDF document text
    • https://rarezeromodon.weebly.com/uploads/1/3/0/8/130874170/2acb00.pdfIn PDF document text
    • https://labomozojaxige.weebly.com/uploads/1/3/0/7/130738499/fd3eea5916a.pdfIn PDF document text
    • http://successinyourlif.website/bobcat_e45_service_manual5bgxo.pdfIn PDF document text
    • http://pedalini.club/sonikizexodovzou7.pdfIn PDF document text
    • http://ens-pictures.ru/33397170847gias0.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/dd7b5e10-2464-4745-9064-a9cc699be9bd/54920675283.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/15299489806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a58704-3738-4249-9c7e-89541b479498/dewojimenuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bfd779d-3426-44d4-9877-27693ad787e6/bajejitudakopibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb62bfc-61ce-4953-bd71-ff1ea9e11183/what_are_some_examples_of_renewable_energy_sources.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/45606427205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eeb6cf9-6533-4825-b74b-13bb4e95b8d6/1001_albums_you_must_hear_before_you_die_complete_list.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F4 5032 bytes
SHA-256: 06f14db2799311c70a17d6f5313257d5fa710c81f5cd371eaf34c8db9628d926
font_01_sfnt_off00015220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15220 10604 bytes
SHA-256: 732c0a8ad749640a013fedb924f9ff083eb5e58b487efd55d5927a683d38a41a
font_02_sfnt_off0001764f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1764F 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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