Malicious PDF — malware analysis report

Static analysis result for SHA-256 9177d540891786a3…

MALICIOUS

PDF

82.0 KB Created: 2021-03-18 19:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e5e72da0cf612c213447acd822772f0 SHA-1: 732c48c7b72bf636455495aded39cc681dc98d20 SHA-256: 9177d540891786a345f62a2c1dc5831eee1a64ac8e0d5e288c49c086a652591a
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous external URIs, with a high heuristic score indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. The embedded URL 'https://vilenefex.ru/strik?utm_term=is+pattern+trading+profitable' is the primary indicator of a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=is+pattern+trading+profitable
    • http://tameenegypt.com/westinghouse_microwave_model_wst3501q1b6e.pdf
    • http://kigalasabipigo.medianewsonline.com/mefufabiferixirejopiwu.pdf
    • http://tazizinujumijoj.mywebcommunity.org/brgschaft_miete.pdf
    • http://wivevadevenumet.mywebcommunity.org/17474650643.pdf
    • http://tiktoktop.design/86678342548kgdd5.pdf
    • http://fitokaps.xyz/wedomugoq6pdj.pdf
    • http://vosajizegek.mypressonline.com/is_jedi_sage_good.pdf
    • http://moneyindia.site/94776269576kpdpe.pdf
    • http://gexulogoben.sportsontheweb.net/97th_constitutional_amendment_act.pdf
    • http://xibawolafubiz.getenjoyment.net/millennials_at_workplace.pdf
    • http://rebezun.mygamesonline.org/kitchenaid_stand_mixer_tilt_5_quart_rrk150wh_artisan_tilt_white.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fevufanitefega.epizy.com/descargar_batman_arkham_asylum_comic.pdf
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_299658943a1547629dff1f9686dc3382.pdf?index=true
    • https://89b51789-78ca-4763-9282-2883593c0036.filesusr.com/ugd/99b222_4410830baf7f4300b6b9b26559f716e3.pdf?index=true
    • http://fodiwivovekuvut.epizy.com/meade_etx-60at_telescope_reviews.pdf
    • https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_c24272fae0b54dfb984d2140ccdba184.pdf?index=true
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_afddaf8070a34688aba14e81dbcbbf1a.pdf?index=true
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_ae8350b0bb5846469f05f3410d2184d4.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f641.bin
bdd95d19bd35a03a8eb7f2adde031af9911842bbd1950a439d1db820c104ec60
pdf-font-stream PDF embedded font (sfnt) at offset 0xF641 5072 bytes
font_01_sfnt_off00010783.bin
7341eaa927a4068416574bf1870c70a07d162fc4efdaadbfedd7bb501b1dbcba
pdf-font-stream PDF embedded font (sfnt) at offset 0x10783 10424 bytes
font_02_sfnt_off00012b3a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3A 4324 bytes