Malicious PDF — malware analysis report

Static analysis result for SHA-256 de11b2b39611e8b6…

MALICIOUS

PDF

79.2 KB Created: 2021-03-24 11:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 169b5c710852766f7ba1be3dee1ed264 SHA-1: 5e2f58c56029673117f881a23078ff56481f9049 SHA-256: de11b2b39611e8b6daf4733ac90fd6c32f3a3a505c5f959e3ea4fc6471dd1b7d
126 Risk Score

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 an embedded URL pointing to a disposable domain, which is a common tactic for distributing malware or conducting phishing campaigns. The document body, though heavily obfuscated, contains text related to 'Playstation 3 controller price in south africa', suggesting a lure to attract clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=playstation+3+controller+price+in+south+africa PDF link annotation
    • https://cdn.sqhk.co/ruwiketi/IjjRQif/shark_dating_simulator_free_download.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/blood_bowl_2_guide_chaos.pdfIn PDF document text
    • http://henrysavbr.site/zalemnu4lk.pdfIn PDF document text
    • http://fruitslope.online/telecharger_whatsapp_2018_apk_gratuit_pour_androidthtc1.pdfIn PDF document text
    • https://cdn.sqhk.co/gugosobor/fhdjdBT/front_battalion_world_war_2_tank.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/assembler_deux_en_un_seul.pdfIn PDF document text
    • http://freedate18.xyz/ponenixaxetivavuvu8z0gm.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/borezinugid.pdfIn PDF document text
    • http://uaregroup.com/414105441620u4fx.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/3a515811-d973-491e-8202-4a2b6701e484/90393449468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd24e2c-acb9-44bf-be42-3690bb2e7bc7/roomba_960_vs_980_noise.pdfIn PDF document text
    • http://pefimubis.myartsonline.com/pomobezupan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d43d419-99a3-4720-8cd7-4736bf371423/6057924681.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/what_is_aggregate_planning_and_what_is_its_purpose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d13bfc-a789-4d2b-b41f-2325bb7c0354/2018_subaru_forester_fuel_economy_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bde65e1-9129-4cd6-b0be-a82ecd5c7c21/sources_of_the_western_tradition_volume_2_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c8f627-da22-4700-8fb1-ef4e0cc0eadd/warcraft_legion_system_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa636c3f-9b3e-45f4-bf47-cf43a88ed3b7/86311964608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3652771b-5902-47ce-9da5-7fa29baa41a2/yaesu_ft-7800_software.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_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 5372 bytes
SHA-256: 9ae1ff3fb5d1c1e7a56fd8646056f804e5d8be2d06a85b64b9bcb4ddfca0f30c
font_01_sfnt_off00010846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10846 11184 bytes
SHA-256: f1094b414e8c4081a384cf8d6aa49f96d85a980a919c49f67869beac737def0e

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