Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f5ec8833b1e330…

MALICIOUS

PDF

75.0 KB Created: 2021-04-06 14:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05fb711b3160e52ef80917bc50d310af SHA-1: 510b40f36f28c81c5aac37de7c40405d7c964371 SHA-256: e2f5ec8833b1e3309e2ae5c12b55fc90e2c3c00337cdee63ceeabb951411d0ff
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with one pointing to 'lozipotod.ru', suggesting an attempt to redirect the user to a potentially harmful site. The PDF structure and embedded links are indicative of a phishing lure, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/123?utm_term=chemistry+themes+for+powerpoint+2010+free
    • http://003-center.ru/world_war_z_pc_game_review_ignfrlhn.pdf
    • http://thelait.pro/49803321002i3jdl.pdf
    • https://cdn.sqhk.co/mekaxosur/jfXILgg/xabuvizuzusixukedoz.pdf
    • https://cdn.sqhk.co/kezavilageg/cpgiBij/regram_repost_for_instagram_screenshot_2.pdf
    • https://cdn.sqhk.co/jolodovi/idx9byn/mepidawosivef.pdf
    • http://lnstagram-helping-centre.com/zegataxuzoviw606a.pdf
    • https://cdn.sqhk.co/zurajekiviw/KjfcDia/slackline_industries_trickline.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6bde2979-4dcb-4096-80d7-ed5cdb4db48b/what_is_the_language_in_god_of_war_4_day_one_edition.pdf
    • https://s3.amazonaws.com/padosumifubobo/bachelor_of_business_information_systems.pdf
    • http://fudofidibodobat.epizy.com/rowowinoj.pdf
    • http://zedakukabizo.epizy.com/komazopegaxiralif.pdf
    • https://uploads.strikinglycdn.com/files/4cc3b5e4-8e45-4f51-87bb-fb47ad273597/how_to_install_android_os_on_samsung_galaxy_tab_3.pdf
    • http://sopexalibip.onlinewebshop.net/menace_d_accouchement_prmatur.pdf
    • http://fabonejane.onlinewebshop.net/40453979287.pdf
    • https://s3.amazonaws.com/bodajaku/javobowurenawutoxexi.pdf
    • https://s3.amazonaws.com/neporezofov/goverenugixixenoveveg.pdf
    • https://uploads.strikinglycdn.com/files/948fadb0-54dd-46fd-b14f-5f777a9aa675/how_to_upload_pictures_on_a_digital_frame.pdf
    • https://s3.amazonaws.com/negonanopix/amazon_prime_apk_free.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_off0000dc31.bin
4e7574c0e487b62467c73c8f259e741a79990ba09ff935de8e9c5edda7df5ead		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC31 5228 bytes
font_01_sfnt_off0000edf3.bin
70c2a754129a96abbb31890b1abb83b541ce961acce6e6e4e503778a97fd4dfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 10264 bytes
font_02_sfnt_off000110c9.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110C9 4324 bytes

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