Malicious PDF — malware analysis report

Static analysis result for SHA-256 acae2bdfe4b918de…

MALICIOUS

PDF

76.0 KB Created: 2021-03-13 21:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3475d0b2b7e2f3b0cd2ca92f74e3e93f SHA-1: e8e6279362d172eaa9683225f15bd2a29e43995d SHA-256: acae2bdfe4b918de870169923e60ee6fb782c9ed71e7d1529f15515a96063ba7
96 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, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a book title, suggesting a social engineering tactic to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/award?keyword=a+beginner+s+guide+to+descartes+meditations+pdf
    • http://lestyprin.online/what_does_prone_to_believe_meaning_in_hindif5bdl.pdf
    • http://center-san.ru/zetikawulewafuxibasijisflzy9.pdf
    • https://cdn-cms.f-static.net/uploads/4382614/normal_602df60643975.pdf
    • https://cdn.sqhk.co/nasubivapu/aifShf6/vozadajozix.pdf
    • https://cdn-cms.f-static.net/uploads/4481667/normal_60169505383ae.pdf
    • http://balonedud.iblogger.org/jalitalajipupekal.pdf
    • https://cdn.sqhk.co/gujurolekuma/iTHM2vM/small_business_plan_format_doc.pdf
    • http://merishwheelrecords.com/vawusogudezezanejlvuh.pdf
    • https://cdn.sqhk.co/wepevuwu/aIggbgg/wilton_spiderman_cake_decorating_instructions.pdf
    • https://cdn.sqhk.co/fusozuwalas/gyhxhgl/five_nights_at_freddy_s_2_song_download.pdf
    • http://bosnoslovnoejelaniekupit.xyz/kufunudjkbc.pdf
    • http://rozapunu.22web.org/xuzonapapifomaluzegu.pdf
    • https://cdn.sqhk.co/bikegola/0WAgrji/file_manager_app_download_for_pc.pdf
    • https://cdn-cms.f-static.net/uploads/4384469/normal_604631fe12157.pdf
    • http://giocodigital.fun/extreme_car_racing_simulator_3dq299o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tulakitukubipi.epizy.com/how_to_make_100_million_in_real_estate.pdf
    • http://xetorofowuwid.epizy.com/45884134429.pdf
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_99fde721b0444d95af37fe1aee069d75.pdf?index=true
    • http://vurisadazuxe.epizy.com/all_of_me_piano_sheet_music_intermediate.pdf
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_4bd5c7e5cbc0487080ae0b3349a2f184.pdf?index=true
    • http://lizaxuru.rf.gd/49398583501.pdf
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_cbfb209b59f7446c872ed08250bb62b5.pdf?index=true
    • http://nobufep.epizy.com/2012_dodge_durango_sxt_for_sale.pdf
    • http://wimovokixopipi.rf.gd/mevimatamazetomozosarevut.pdf
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_967d8a2837ba4c47bd9579f3efbf8327.pdf?index=true
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_624f463678ce4f4498c74ee50de0ceef.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac1.bin
7fd7ac71fe01febf5689ae1652455220f3ba1222f5457e76577d6ac1a2c32571		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 5572 bytes
font_01_sfnt_off0000fda3.bin
af7368fa9305378a651d0b62a0f721b947a83dced0a34165baf14fcee4e3c0cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 10776 bytes

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