Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e59fc4fa236d7fe…

MALICIOUS

PDF

83.2 KB Created: 2021-03-29 12:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0f605e7bc02129a13d7f977e44080da SHA-1: e02d2aa7e54f641003c4ca67ef1af33fccd9d790 SHA-256: 2e59fc4fa236d7fe6778f10dc37340b621d90bf41c3b10416edef05257bfd6c5
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, indicative of a link farm or phishing attempt. The presence of a 'download button' lure further suggests a malicious workflow. While no scripts were explicitly extracted, the PDF structure and numerous external URLs strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/award?keyword=10th+new+english+guide+pdf
    • http://nulepunu.22web.org/rcog_guideline_for_hyperemesis_gravidarum.pdf
    • http://gemofesane.medianewsonline.com/vicks_cool_mist_humidifier_walgreens.pdf
    • http://bazubufawe.22web.org/houses_in_astrology.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://gagolabirej.atwebpages.com/szck_trleri_konu_anlatm.pdf
    • https://uploads.strikinglycdn.com/files/8af82527-0144-4f22-9f24-ef9096ad9da2/bonusijub.pdf
    • https://s3.amazonaws.com/waxegatulo/how_to_charge_a_everstart_jump_starter_750a.pdf
    • https://s3.amazonaws.com/wusone/rorakugo.pdf
    • https://s3.amazonaws.com/posaxugidut/do_unix_and_linux_have_same_commands.pdf
    • https://uploads.strikinglycdn.com/files/63892712-bdb3-4d28-bb34-d57b1b065d9e/beats_studio_3_wireless_review_2020.pdf
    • https://s3.amazonaws.com/dapekufoxiraku/83626502128.pdf
    • https://uploads.strikinglycdn.com/files/61c095d5-f30a-4b1a-a6f2-e761a467a900/why_is_my_everstar_portable_air_conditioner_leaking_water.pdf
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_e4d23991aaa2458ebe6c8ff647d0d6a0.pdf?index=true
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_c471ab48b1bf4820b01e4de1f0969db1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/67bd8a60-fa11-4970-94f2-5639c6512500/how_do_i_know_if_my_ge_oven_is_self_cleaning.pdf
    • https://s3.amazonaws.com/vedexajawo/android_application_package.pdf
    • http://besuwodusibix.rf.gd/xivomujilizatekesow.pdf
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_904d228c0d654eb0a04f610f598c6e23.pdf?index=true
    • https://uploads.strikinglycdn.com/files/36b66c83-c0b4-4fe9-8a0c-91ec19060947/64411794655.pdf
    • https://uploads.strikinglycdn.com/files/5bccaac7-88eb-41bc-9e19-1019ff12c969/xalamikokutubulabenusopal.pdf
    • http://ketabigumowun.atwebpages.com/73847528527.pdf
    • http://mojozore.myartsonline.com/a_tryst_with_destiny.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee6.bin
272a85713c788e5fc22e819d7436f32afc41e4872b9cee461f2e52d8c1938301		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE6 5188 bytes
font_01_sfnt_off000100a9.bin
d4d5858268cd2f5e1a23f4e0c394a9a7d283f53ad0a12c035a02903e868fde71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A9 9704 bytes
font_02_sfnt_off00011a46.bin
593ce31ab976ec15c5e992d9b9f904acdfccd58b78bc7c6af5b9e2cc84f318b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A46 12176 bytes

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