Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9af3d5d120427d…

MALICIOUS

PDF

103.9 KB Created: 2021-04-18 07:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2c0c3d1d78637a75055a4b4a4ba1fb54 SHA-1: 4120109518405060ceb673dc85c591d9330e5e2f SHA-256: 2c9af3d5d120427dca033e64a9009166baf3fe4c3507b2ad5fa5d7597fad4c7b
126 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and one specific URL is associated with a deceptive 'link farm' heuristic. The document body, though heavily obfuscated, suggests a lure related to 'exchange of matter and energy in living beings', which is likely a pretext to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://fokemale.ru/strik?utm_term=que+es+intercambio+de+materia+y+energia+en+los+seres+vivos PDF link annotation
    • http://mifirejetevina.getenjoyment.net/acropora_humilis.pdfIn PDF document text
    • http://mesikigodijope.mypressonline.com/calligraphy_gothic.pdfIn PDF document text
    • http://pubofumoxo.scienceontheweb.net/95632451541.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/pdf_to_kindle_format_converter_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/aojjje6/22363804925.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/orthographe_francais_gratuit.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/electronics_and_communication_engineering_books_free_download.pdfIn PDF document text
    • https://mizijuwewis.weebly.com/uploads/1/3/4/3/134392366/9d2bed8fc.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/hchaVje/anonymous_hacker_hd_4k_wallpaper.pdfIn PDF document text
    • https://dinabowufijub.weebly.com/uploads/1/3/4/7/134751612/raludejivefusupod.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvevalor/4ghhaKP/2020_moto_guzzi_v7iii_racer.pdfIn PDF document text
    • https://cdn.sqhk.co/xakutofi/j1tgdhA/tamefilofiruvokidomoke.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/mpmb_spell_sheet_generator.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
    • http://bokonejedebi.rf.gd/colorado_rockies_players_weekend_uniforms.pdfIn PDF document text
    • http://soxarigur.myartsonline.com/liturgical_music_today.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/titugaka.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BA 3172 bytes
SHA-256: f4ec17a90c84c1a5cce9e469d3bca6e05f4c93870647444cc4a3562528f19b6e
font_01_sfnt_off000133fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FB 5504 bytes
SHA-256: 36f9f480748080901f0902cddcc0b064554e013af86ee262d1d07858aba2cdd8
font_02_sfnt_off0001469e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1469E 12008 bytes
SHA-256: 56a2f450d22bd0845b49c22fee060831632d15b20565a95ae959288052e2befd
font_03_sfnt_off00016df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DF7 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_04_sfnt_off00018324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18324 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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