Malicious PDF — malware analysis report

Static analysis result for SHA-256 922194f0ec8bd297…

MALICIOUS

PDF

130.5 KB Created: 2021-05-12 13:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 86eb6457d50325df52d4cd4321a52e73 SHA-1: 2601b7c119c28633df46535b3570ad53581a3986 SHA-256: 922194f0ec8bd29788916de31d97970c8923f0a1c44d9ec3a08a0b8dff4f0ac3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. While 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 0.9948

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://leonvi.ru/strik?utm_term=usb+wiring+diagram+power PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412767/normal_5ff13c9088270.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/elements_of_statistical_learning_2nd_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457854/normal_5fe85571929f4.pdfIn PDF document text
    • http://parovosi.mygamesonline.org/26720594924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424331/normal_605f7614a3e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_601851fbd7cb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_603d3b0418491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_602b7e1d9696c.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/vosewinumabusafusino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_606aca396a773.pdfIn PDF document text
    • http://majusenise.sportsontheweb.net/96895013476.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453336/normal_5fc9ebb6b8f0b.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/lopesixazifaxa.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/xamimaru.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/9034785244.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/what_is_the_exterior_angle_of_a_regular_polygon_with_30_sides.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_602e9892652c0.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://uploads.strikinglycdn.com/files/a76fe1e3-484b-4ac9-869c-7bb4f212b5ce/eso_vampire_blood_fiend_spawn_locations.pdfIn PDF document text
    • http://jekurur.atwebpages.com/water_pollution_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/pizusokopavutujajigekunit.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/jugexufumuxegelixepatoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6450c3c4-87fc-4b4e-9d15-b5c559a23048/where_did_they_film_war_horse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4588f7b2-b914-494e-89a5-3b6963ad589a/stc_1000_thermostat_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f391c30-5db2-40b9-bafa-67333f938d71/gavorefivorenilativa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac2061fc-3ef5-4864-9e09-74e4213dd272/dell_battery_not_charging_after_bios_update.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/91078952817.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/vozuvojo.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_off0001b497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B497 5180 bytes
SHA-256: 334dfb7f15bec4e22a600fcd1fd9594540f25b1bc9b939b1b98f2f91fc599304
font_01_sfnt_off0001c611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C611 11664 bytes
SHA-256: 5ae69a617991f095087b8a57ffa959e02a15116deb3c5b6577cdf4649fe65aed
font_02_sfnt_off0001edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDB7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3