Malicious PDF — malware analysis report

Static analysis result for SHA-256 192e9f02d38a5b86…

MALICIOUS

PDF

69.0 KB Created: 2021-04-04 04:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd25ccabafdf9954e7753ef320e5f7b3 SHA-1: 70c44355a1927e1fa886122ee43287ab11892e4a SHA-256: 192e9f02d38a5b861964dc663050f859925b2e067e5d7da801faf65062d1301d
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://seumenha.ru/123?utm_term=aashto+drainage+manual+pdf
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/0ee1b.pdf
    • https://lusebedadejaxid.weebly.com/uploads/1/3/1/4/131407110/4e8cd75fe944412.pdf
    • http://tarekupi.scienceontheweb.net/gexunaruseturuwipat.pdf
    • https://ruzoriro.weebly.com/uploads/1/3/5/9/135975417/xosemuvak_miradokimupapon_xenigupivisis.pdf
    • https://cdn.sqhk.co/pirujezexod/nJjaQI0/dollar_store_deals_online.pdf
    • https://vazexisosumufil.weebly.com/uploads/1/3/4/4/134465451/fefogepezas.pdf
    • https://cdn.sqhk.co/sadudolamom/ijRicsO/pottery_galleries_london.pdf
    • https://pozivikebesar.weebly.com/uploads/1/3/4/7/134759309/28bde354caeb23.pdf
    • http://jolijivik.scienceontheweb.net/what_are_the_5_types_of_speeches.pdf
    • https://kofitabalu.weebly.com/uploads/1/3/0/7/130775223/taminidikikubotijon.pdf
    • http://vevaxogejaz.scienceontheweb.net/how_to_use_the_super_snark_tuner.pdf
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/93beae139a.pdf
    • https://cdn.sqhk.co/zotofoza/9n0Jnia/asphalt_6_apk_pour_android.pdf
    • https://romevezijije.weebly.com/uploads/1/3/4/7/134756673/duvotanire_ruzepopajezarur_nifub_kalidakil.pdf
    • https://cdn.sqhk.co/kagalitisup/iR8MDy3/91245989790.pdf
    • http://tupaxeguna.scienceontheweb.net/diffraction_grating_experiment_viva_questions.pdf
    • https://nabaduvikarupad.weebly.com/uploads/1/3/4/0/134096068/3486067.pdf
    • http://gapagal.mywebcommunity.org/79602860311.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mewabetowa.myartsonline.com/fistula_perianal_clasificacion.pdf
    • http://kipejefanowisu.atwebpages.com/a_case_for_amillennialism_kim_riddlebarger.pdf
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_37c5414090b34c58b94b853ab0757d3f.pdf?index=true
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_ca9d53cb487549f7a6ef6c478e1b79d2.pdf?index=true
    • http://gemovimuwopete.atwebpages.com/carcinoma_anaplsico_de_tiroides.pdf
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_396d4caa83724cd181816c1b87e98b1a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf3d.bin
62f4040e0f41a9c8e51d71c2bb4b9557a4914bd3096711881434cf41494bc462		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3D 5444 bytes
font_01_sfnt_off0000e197.bin
fb987984cc30ac515bd6087faa33c8f7c445087939ed18cbac85c9998d53f519		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 10884 bytes

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