Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ef88cd4a314603…

MALICIOUS

PDF

70.7 KB Created: 2021-03-07 17:28:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e6597c21fb7b812b30128f9afd7f67e SHA-1: 5f748a9f27f95dca5f2de77b972a3a1c2753c519 SHA-256: e6ef88cd4a31460372c59ab23b028361b1fb474bb4defa0b5fd01059e54fa081
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 0.9960

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://kuzutuzo.ru/strik?utm_term=how+to+answer+do+i+know+you+questions PDF link annotation
    • http://fezibinuzot.iblogger.org/xozib.pdfIn PDF document text
    • http://help-copyrightservice.xyz/tavujuvefeniwoxuzoczh.pdfIn PDF document text
    • https://keboxatoxumire.weebly.com/uploads/1/3/4/5/134591907/1896769.pdfIn PDF document text
    • https://xafudilolara.weebly.com/uploads/1/3/4/7/134744509/9387638.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/hfwijgg/real_steel_world_robot_boxing_mod_game_download.pdfIn PDF document text
    • http://evatopshop.xyz/19246245823xzea1.pdfIn PDF document text
    • https://mimifutugeteze.weebly.com/uploads/1/3/0/8/130874087/joguduvoje-kalasawivoma.pdfIn PDF document text
    • https://pufujodixig.weebly.com/uploads/1/3/1/4/131438007/6ec92a52788b1.pdfIn PDF document text
    • http://kersita.fun/ionic_breeze_quadra_s1737_manualikgtw.pdfIn PDF document text
    • http://dihtyar.online/education_board_2019_marksheetltr6a.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/iidH4hc/stickman_destruction_4_annihilation_mod_apk.pdfIn PDF document text
    • https://tojejalunegod.weebly.com/uploads/1/3/2/7/132710717/xilog.pdfIn PDF document text
    • http://formblckr1.xyz/20692157016gcx7j.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/ahaN2jg/sizomifufivowo.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/ziwuvijevo/demography_and_economic_development.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/baroque_antique_script.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/causes_of_cardiomyopathy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d660b3a1-2b4c-4e9a-a665-822dcb4482ca/what_is_el_pollo_loco_chickenless_pollo.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/game_bounce_tales_320x240_jar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb64d28a-2f71-4e44-b526-3a2437991007/zilabutumise.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/fukoper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc0b7e1e-3a75-42bf-a2fe-43c598712a0f/how_to_set_boundaries_in_your_marriage.pdfIn PDF document text
    • http://tojopoxirer.rf.gd/rozizerepetedox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada29541-e695-457c-9815-dec87316dd10/zoguzaxuki.pdfIn PDF document text
    • http://nimoxorud.epizy.com/best_free_blogspot_templates.pdfIn PDF document text
    • http://nejoselox.epizy.com/olympus_om-d_em-1_mkii_review.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_off0000d8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D1 5132 bytes
SHA-256: c8c31d79df51132e7ec1ee9860a42be42355b8c46f08611354d9e0b93aa07b8a
font_01_sfnt_off0000ea68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 10140 bytes
SHA-256: 2de14762ba3b402a38357fa05d9e58de2f5e63cbf3be3efa1d87ba5a54781480

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