Malicious PDF — malware analysis report

Static analysis result for SHA-256 723754b404742219…

MALICIOUS

PDF

74.9 KB Created: 2021-06-08 11:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 73e28e20f1e092dc7d56fc5a36b71435 SHA-1: 9526a02931ee54f1624908100d51c8eef15e57bc SHA-256: 723754b404742219402ef07b00a88398ec8e7a438e1f672c5035f281ac59ab4e
186 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to various download sites, masquerading as a trainer for Grand Theft Auto: Vice City. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to distribute potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crysiq.ru/pbw?utm_term=gta+vice+city+ultimate+trainer+free+download+for+pc+full+version PDF link annotation
    • https://nunigagajil.weebly.com/uploads/1/3/4/7/134751499/8630603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454990/normal_5fd1649c539e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404103/normal_5fd1cef9928c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474471/normal_60581006cc7e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486763/normal_604da0e859e61.pdfIn PDF document text
    • https://lekomitigukajar.weebly.com/uploads/1/3/5/3/135345412/jagaluraxaxom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_602096add4de8.pdfIn PDF document text
    • https://sajipetifejej.weebly.com/uploads/1/3/4/8/134883768/9855402.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/21d819f5-16e6-4f0c-8b50-c7ecdc40d739/dizesabosaloxeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb793b3-de0d-471b-9769-0e62b5049f1c/pantone_color_chart_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf58b50c-97be-45a7-bcf7-36248d4e16aa/38644175322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aff668da-dd48-49b4-9440-76bf6fd3a0d2/53964169759.pdfIn PDF document text
    • http://fujiserefi.pbworks.com/w/file/fetch/144679758/87783999760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1afaf4d9-c37e-4385-aeba-3e04edb177fc/canadian_red_cross_first_aid__cpr_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e05ddab-af83-4636-9273-24e6b23bb5ce/17123366480.pdfIn PDF document text
    • http://xawaren.pbworks.com/f/how_to_find_the_location_of_a_phone_number_for_free.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/memibegesiwiladuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c8fe47-e63f-43e9-b813-d398f8028601/how_do_i_fix_google_error_404.pdfIn PDF document text
    • http://finebov.pbworks.com/w/file/fetch/144472884/powixawawezuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff2b9bc-9789-4f61-9425-891e8035844a/56499183303.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/w/file/fetch/144574503/popezef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b837e538-3366-42db-864b-756420d115e9/zuduzaxodolewikavidari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cebe2369-3c0f-4e51-8f75-683130bd4a16/rebinexogebujalosifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f396744-1fa1-4365-877a-b9b2bff645a8/cisco_switch_configure_vlan_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257ff751-8885-4b36-bdf9-d683e07ed923/coleman_furnace_mobile_home_filter.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_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 5588 bytes
SHA-256: bf1e5587457bac364d481f0b41f2b9921b2f7fff0906d44aec54a78451908c02
font_01_sfnt_off0000f8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 10844 bytes
SHA-256: b482a2327c72262f1b06bdc4a71fc95e8beaccf9a20a164bc28a5163e86734c4

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