Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25814c9b7a56fde…

MALICIOUS

PDF

89.2 KB Created: 2021-03-22 22:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7d6418d7ad71e5720e69ec990811d26a SHA-1: 2708418ae933854ac708b29cf68f752ef6f3fe25 SHA-256: f25814c9b7a56fde8c58973a63c64e88f6fa6aee30a43d2cfc47bb1d8717624f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm designed to redirect users to malicious sites, specifically advertising a crack for 'Football manager 2016'. The primary IOC is a URL hosted on 'resalured.ru' which is likely the final destination for the malicious payload. Although no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest potential for embedded JavaScript or other exploit mechanisms.

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://resalured.ru/strik?utm_term=football+manager+2016+crack+v8.0.2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502336/normal_5fd2bfdde386c.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/wjhAjbk/go_legacy_dunes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426090/normal_602b276e5eed8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fd085b7b2bd4.pdfIn PDF document text
    • http://naturaitalia.space/what_is_theoretical_framework_in_research_proposalz73e7.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/ih9ZH5p/best_digital_marketing_course_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495685/normal_5fe90ac230f10.pdfIn PDF document text
    • http://astropsychology.site/how_to_find_velocity_of_a_ball_before_it_hits_the_groundj5blq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459322/normal_60399b847b32c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_6025dc437ff6e.pdfIn PDF document text
    • http://oneplusonemain.xyz/21211794466emw1m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387408/normal_5ffc48ccc8488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416500/normal_5fd3caf272dbc.pdfIn PDF document text
    • http://supportcopyright.net/crown_pallet_jack_operator_manualb8saz.pdfIn PDF document text
    • http://fitness-ital.fun/xasifepix5tug7.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/hjajdxy/try_not_to_laugh_challenge_clean_impossible_2018.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/8d16af08-672a-4084-aa21-61d821610e6a/i_want_to_learn_english_speaking_online_free_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bad40b5-f5b1-41e0-aea4-4b53549f19de/nazovuzal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870abd14-6207-4728-80f4-ad475020c191/molaguxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08af8b25-4445-46c3-a653-36997244cfcd/intermatic_timer_instructions_et90000.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_off0001087c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087C 5864 bytes
SHA-256: 4721be49c67904c069016f75188686b3d616b86670fe050f96d133084efbb3bc
font_01_sfnt_off00011c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C77 26992 bytes
SHA-256: 5494e248d6b76e4f3ac6a37d800fc0e43af3ec41369b18e88f50c06097860804

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