Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5ea3e3fc36ce20…

MALICIOUS

PDF

81.5 KB Created: 2021-03-08 15:36:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f0a45260003f9c442f405a60d8523995 SHA-1: 45339a464ecd6fe1a896d82bfe0b6c4e59cf4356 SHA-256: ac5ea3e3fc36ce20b1a6a5aa03b9ff865e35be40c5bd0ca8133aa0dc9a1bff8b
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ClamAV as 'Pdf.Phishing.Trojan'. The ML classifier also indicates a high probability of maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'Afcon fixtures pdf', directing users to external sites.

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://vilenefex.ru/award?keyword=afcon+fixtures+pdf PDF link annotation
    • http://zokoxakabu.medianewsonline.com/66262864308.pdfIn PDF document text
    • http://noxesim.iblogger.org/nitibavuk.pdfIn PDF document text
    • http://pegejoruvufiron.sportsontheweb.net/2006_honda_civic_ex_coupe_third_brake_light_replacement.pdfIn PDF document text
    • http://fituxem.sportsontheweb.net/arduino_board_has_which_of_the_following_components_course_hero.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/lg_mini_split_air_conditioner_remote_control.pdfIn PDF document text
    • http://mugipojezekegul.iblogger.org/24379595287.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/57622510303.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/36364215162.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuteninuxad.rf.gd/jimisizusagoziv.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_e6a29c11c9b348a1ae4c34d27b9b79b4.pdf?index=trueIn PDF document text
    • http://mirepili.epizy.com/requisition_template.pdfIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_e8887feb19594dba9dc285089a8443db.pdf?index=trueIn PDF document text
    • http://jopixerijoraraw.epizy.com/an_introduction_to_mathematical_cryptography_by_hoffstein_pipher_silverman.pdfIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_7a68751f1cc2491eba6e15e04212f538.pdf?index=trueIn PDF document text
    • http://buruwebiza.rf.gd/84520302699.pdfIn PDF document text
    • http://mogovotodokat.rf.gd/how_to_get_to_the_boiler_room_in_resident_evil_2.pdfIn PDF document text
    • http://nopuwezivobevuk.rf.gd/pupilowenolag.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_172e139427ab46cf8e0c26457aeeca2c.pdf?index=trueIn PDF document text
    • http://nomamazuzut.atwebpages.com/ecuaciones_de_segundo_grado_ejemplos_formula_general.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE2 4964 bytes
SHA-256: 74f46fd346b9f2d5371ba2732c966ce49e98832b47e6557734caa2b61a50ad2d
font_01_sfnt_off0000fce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE5 19780 bytes
SHA-256: fed89b59fc59475cf3708109a94b802526fefa351af50d0bd93954c1baee9938

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