Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c07b508fba34dc…

MALICIOUS

PDF

118.5 KB Created: 2021-02-14 03:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6947e7c8bbd96e7b900935e85616606c SHA-1: 9b542378a4b86a65c6bfe1be07859740e6feffd6 SHA-256: f8c07b508fba34dc00702bf4e549f6e316fefbc0253898e17215817b05fd4139
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF document contains numerous external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains keywords related to GTA V modding, likely serving as a lure for an advance-fee scam. The presence of ClamAV detection and ML flagging further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://seumenha.ru/wix?keyword=how+to+become+a+modder+in+gta+5+online+pc+2020 PDF link annotation
    • https://tetemubegogik.weebly.com/uploads/1/3/4/4/134443084/9398805.pdfIn PDF document text
    • https://fabirakarag.weebly.com/uploads/1/3/2/7/132710689/dowuvabepojup.pdfIn PDF document text
    • https://cdn.sqhk.co/bemapebe/5ggjfhb/marketplace_mall_old_stores.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fd2f69bcadeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495392/normal_6010859f9a991.pdfIn PDF document text
    • https://vonipelimodaro.weebly.com/uploads/1/3/0/7/130738487/8094407.pdfIn PDF document text
    • https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/dajegir.pdfIn PDF document text
    • https://xuvamedinomu.weebly.com/uploads/1/3/5/3/135392700/fedojezisurukot.pdfIn PDF document text
    • https://lujovimujesami.weebly.com/uploads/1/3/4/0/134019161/wowupirapu_pevijanet_natevi_tanetopidis.pdfIn PDF document text
    • https://bodakipufasedoj.weebly.com/uploads/1/3/5/9/135972884/salufefukuvotutegixu.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/2bef21a0.pdfIn PDF document text
    • https://cdn.sqhk.co/xabiximakef/ha5OkcB/jbl_music_1_subwoofer.pdfIn PDF document text
    • https://cdn.sqhk.co/zamodozitip/hgjfp1P/super_power_girl_mp3_download_ilkpop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_600a1ce3d323c.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/D9haoH3/4395260850.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/KRJiHig/36676991812.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/wexoteluwag/how_was_your_weekend_funny_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/hotpoint_smart_tech_washing_machine_7kg_manual.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_off00019164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19164 5804 bytes
SHA-256: 2d71c5d83cfbc87e6e9640c76b479af68d5cc272ffe67675242dbcfacf05b53e
font_01_sfnt_off0001a51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A51E 11348 bytes
SHA-256: ee691092d319b4f8c8769dcd2456688546f3b69e99076520783dd72aa1103a6d

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