Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b603ff3de0ec6fa…

MALICIOUS

PDF

71.4 KB Created: 2021-03-13 19:12:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 381dd658aac1885f1fd8b376d737787d SHA-1: 5c472d0a5a4af62c8092b95fdddb46a101525bb6 SHA-256: 7b603ff3de0ec6fa8496793bb3f743c9d97d6f76ff6c9a83f8024f98042fd51b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious download attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The primary URL, https://jacksth.ru/wix?keyword=ranch+n+craft+texture+pack+download, is presented as a lure for a texture pack download, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wix?keyword=ranch+n+craft+texture+pack+download PDF link annotation
    • http://clientbluebadge.com/kuzuzovixegumigofhp53i.pdfIn PDF document text
    • https://lufodeku.weebly.com/uploads/1/3/4/5/134586195/rebukoxijugumas_fizar_sunolixo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384645/normal_5ffc9b692fde2.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/Ecidicw/speed_racing_traffic_car_3d_mod_apk.pdfIn PDF document text
    • https://biwakegexenulu.weebly.com/uploads/1/3/4/4/134437141/2794419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_60288ff302400.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460706/normal_5fcced17062cd.pdfIn PDF document text
    • https://negapopede.weebly.com/uploads/1/3/5/9/135994143/3757506.pdfIn PDF document text
    • https://cdn.sqhk.co/bawijodol/vyNiehb/1604232860.pdfIn PDF document text
    • http://copyrightreports.com/67848733980dfh7f.pdfIn PDF document text
    • https://zonilalafujagep.weebly.com/uploads/1/3/4/7/134731182/lagakabe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378406/normal_5fc96cf3ae8f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_5fd83e06eb945.pdfIn PDF document text
    • https://duwaratax.weebly.com/uploads/1/3/4/6/134621450/6914556.pdfIn PDF document text
    • http://my-favshopf.online/aristotle_metaphysics_book_1ddtt9.pdfIn PDF document text
    • http://fortuneo.biz/2004_honda_odyssey_transmission_shifting_problems5n6lp.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/fefa18d5-cade-4730-8456-21fb5fce952b/96690226368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce8f44a-5ae6-43ae-9c24-ed455edb7fa1/husqvarna_2000_sewing_machine_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de28709b-5dd2-48c6-8ecd-78460744292d/washington_dc_live_cameras_weather.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c8c501-4b29-479f-a545-372203096577/dafopabopelexaguxifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249eb6e9-f607-4dde-a68a-ae82aa7fe2f9/sokawal.pdfIn PDF document text
    • http://potolonufe.epizy.com/sab_brewing_process.pdfIn PDF document text
    • http://lexawelezalum.epizy.com/16341189678.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_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 5296 bytes
SHA-256: 1cac55e9a77c97a58f60fe3283202934dc8b5124a31916bc085b328cae214e67
font_01_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 10680 bytes
SHA-256: bf3ab62479e3a4b9e4645dcea8a6f2cfd3e71d75b45d7a62d492be0e85043bac

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