Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7717a9c7875f80…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 10:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2e2af081a9e3133983d8e39e6ef2a618 SHA-1: 5b9277c3a5d52169c914b3b2ced0c3172615f5bb SHA-256: 5e7717a9c7875f8056cca81e074edfc80027447f447d4741273fada514410ea1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://maypoin.ru/award?keyword=black+panther+comics+pdf+online PDF link annotation
    • https://vojonabof.weebly.com/uploads/1/3/1/3/131383251/c99f087fb1ca70f.pdfIn PDF document text
    • https://kipigifusulip.weebly.com/uploads/1/3/4/4/134437712/f623df3f30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fee68909e10f.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/mhihe9M/23594538737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_601b425329fca.pdfIn PDF document text
    • https://zuxivojeduzudog.weebly.com/uploads/1/3/1/3/131381782/losin.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/cifMiif/dimuv.pdfIn PDF document text
    • https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/877fe433b1f4e1b.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/Cr5Khfd/virus_protection_for_iphone_and_ipad.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/conflict_management_styles_questionnaire.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/R1kwhcM/solar_system_planets_in_order_of_size.pdfIn PDF document text
    • https://pejagefetem.weebly.com/uploads/1/3/0/8/130815482/zosolisuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389801/normal_601571df93634.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
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_fe914e7d950943719ef5c9e90722d5f0.pdf?index=trueIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_e2077d09941f49b09d955ea45bec12cd.pdf?index=trueIn PDF document text
    • http://likutolejit.onlinewebshop.net/dufororukelu.pdfIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_7d801a3b57164f0fab8327f4fe92c725.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d66f5899-bad9-47d6-a232-e8bc369903a8/41362540419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b288e1-820e-429f-8e88-bbe31c090de8/netgear_gs105e_reset.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/how_to_make_money_streaming_on_twitch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15a08bd-4214-4f0d-bb54-3b242b5f6340/kroger_blood_pressure_monitor_error_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be51529c-1f5c-43db-9f68-4f402d29d022/bepojas.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_4fa072c3cda044b9beafb10814e5d4d4.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC6 5296 bytes
SHA-256: c4229769a2121fdb77ee6f95feb9016d68843908ea6fac576eba227ffd28422f
font_01_sfnt_off0000de8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8B 10380 bytes
SHA-256: a138ef436b2a15f22282f94cb9c164597efca533f27e8b420d9d9dda44b51044
font_02_sfnt_off00010226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10226 16164 bytes
SHA-256: 1f773c7a7450f03bde076cc55d70989549729bf7b3b780ce5eaadefca762edb6
font_03_sfnt_off0001173c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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