Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32f3532ee3569fa…

MALICIOUS

PDF

80.4 KB Created: 2021-03-02 02:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9adf35da246337aa34ace1b338a1ed34 SHA-1: 3b10ae813eb4fe1fedfbb87f2fbb3c0bf63a2c3e SHA-256: b32f3532ee3569fa03b9422dce5f1cfc8603960fba2916844cef0515695abcf6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is designed to host many links on low-reputation domains, likely to redirect users to malicious content.

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://pelibifir.ru/wix?keyword=wishes+fulfilled+pdf PDF link annotation
    • https://dafavazama.weebly.com/uploads/1/3/4/8/134893815/6706d8a.pdfIn PDF document text
    • http://rerubin.space/31442199367ope20.pdfIn PDF document text
    • https://tewamuwomipatus.weebly.com/uploads/1/3/0/9/130969874/505200.pdfIn PDF document text
    • http://gimogorox.22web.org/40430167856.pdfIn PDF document text
    • http://reduslimitalia.website/pokemon_reborn_mega_stonesxyw1t.pdfIn PDF document text
    • http://sushibara.net/hp_laserjet_p1102_toner_cartridge_price_in_bangladeshtxpwf.pdfIn PDF document text
    • https://ramorebuba.weebly.com/uploads/1/3/4/8/134898890/bixajorivexafo.pdfIn PDF document text
    • https://nonaxoboru.weebly.com/uploads/1/3/4/4/134467623/weximaroriros.pdfIn PDF document text
    • http://verifiedbadges-form.com/supernatural_cast_season_15_episode_6tg27a.pdfIn PDF document text
    • http://hugertely.xyz/nifitavilsrt37.pdfIn PDF document text
    • http://bestgirl69.com/auto_background_changer_apk_downloadxt3e5.pdfIn PDF document text
    • http://telemprom.xyz/9063772384yhwjq.pdfIn PDF document text
    • http://mavitrade.com/58260015149hwpcg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://putetudufotu.rf.gd/romeo_julieta_wide_churchill_price.pdfIn PDF document text
    • http://zejajedep.rf.gd/33294560869.pdfIn PDF document text
    • http://konemuga.epizy.com/aws_cloud_interview_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 4424 bytes
SHA-256: 83b1cfe5509273fb21ef91b8934abc76d89fec07588d4c56031be7de6d7726b7
font_01_sfnt_off00010432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10432 9972 bytes
SHA-256: 1eb1c85646fb63e2d8a1e03574b26c7b9132baec76d7072110e9ae75b3cc06f6
font_02_sfnt_off00012663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12663 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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