Malicious PDF — malware analysis report

Static analysis result for SHA-256 d053e8cb2d14bc32…

MALICIOUS

PDF

73.7 KB Created: 2021-03-25 14:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e16c4b27c241b5d0b59223b8ee2d46c SHA-1: 88d46812b1198096104b884021c9ed0e7c6424ee SHA-256: d053e8cb2d14bc32b77606c7b1ba6bd32f76f8a0d53be6be56790859549e0acd
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with one specifically pointing to 'vilenefex.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to an oven manual, likely intended to trick users into visiting the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=caloric+prestige+series+electric+oven+manual
    • http://tareworig.mywebcommunity.org/neonatal_s._t._a._b._l._e_program.pdf
    • https://cdn.sqhk.co/medujebukoma/CFWjeji/cartoon_anime_color_by_number_apk.pdf
    • https://cdn.sqhk.co/dasisogi/Njfjigu/baby_yoda_hd_wallpaper_iphone.pdf
    • http://fobativ.mywebcommunity.org/samsung_rfg298hdrs_ice_maker_problems.pdf
    • https://cdn.sqhk.co/lanumakefu/ZjhZVNN/nefojofifurotunudi.pdf
    • https://cdn.sqhk.co/fuluniziwav/vigCAjd/clavinova_piano_dimensions.pdf
    • http://vijesojoruw.22web.org/molosonexiwor.pdf
    • http://josumewemuzob.getenjoyment.net/femolupijelatimu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_8a42050fcbdd4c64b28c8a03abf10bb9.pdf?index=true
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_a689eb9c17854c7db4b064bac299fa8d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f246f5dd-3d09-45e8-88d0-089185719b49/70991896635.pdf
    • http://zisukuvi.atwebpages.com/whirlpool_cabrio_washing_machine_manual.pdf
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_65534b3f3b5345e4ab3449e1a45bc6fc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e57f0bf8-092c-419a-bcb3-45270814945a/99143560438.pdf
    • https://uploads.strikinglycdn.com/files/06667880-b2f9-4095-91cf-9c767d40bc34/tufupabuxutoxipikusajuxo.pdf
    • http://xolomen.epizy.com/sfg_2_4._0_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/533a6a0d-ef84-4b6a-a8cd-be482197be47/culture_of_honor_danny_silk.pdf
    • http://timikawimi.rf.gd/93654401829.pdf
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_58f71e77422e49b9886c1705c4c51852.pdf?index=true
    • http://bujijawuta.atwebpages.com/69010011474.pdf
    • 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_off0000d380.bin
61e4cc9931b54dc08473093a9a9e91d54f59bd206469789c6a00409700228e5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD380 5220 bytes
font_01_sfnt_off0000e535.bin
6ebd2c487d1eaddc04237ee332478df5cd3ecd727650d9a92a8b2e9a72cca437		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 11916 bytes
font_02_sfnt_off00010b7c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7C 4324 bytes

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