Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b6fa54884e8cae…

MALICIOUS

PDF

82.9 KB Created: 2021-03-13 20:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9485677320004104a1626524688e2550 SHA-1: 7ade607d4622a169969b353b4f77de2f8baef9fc SHA-256: c2b6fa54884e8cae1c4e154ae6d7290ca301f246f457b57075fbf325ff6b7801
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to academic search results, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/award?keyword=cryopreservation+of+gametes+and+embryos+pdf
    • http://vsspb.ru/886583250906nf8t.pdf
    • http://item-get.top/present_perfect_and_past_simple_exercises_with_answers1miav.pdf
    • http://feyakast.online/the_mysterious_benedict_society_and_the_riddle_of_ages_wikipp12w.pdf
    • https://cdn.sqhk.co/femokuxajuz/hIwimii/tezaxemupipafanisi.pdf
    • https://cdn.sqhk.co/wobuwaseja/ijhhspu/lejupasivafibadogani.pdf
    • http://enots.space/144897549443zgwx.pdf
    • http://detonic-ordina.website/blackberry_priv_android_pieew6as.pdf
    • http://reduslim-buy.site/97120206850nv9hz.pdf
    • http://bristol-yalta.run/3308745495jfcrj.pdf
    • http://begdas.fun/ethical_pathways_of_internal_audit_reporting_linesc55bo.pdf
    • http://ilook.market/miss_peregrine_series_book_4w9eua.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dawozisi.rf.gd/pibalidozewimisir.pdf
    • http://lumipanu.epizy.com/75255263583.pdf
    • https://uploads.strikinglycdn.com/files/95559acf-86b4-42bf-9b82-d1662285adb1/37925879097.pdf
    • https://uploads.strikinglycdn.com/files/1e909504-c437-4126-bf7e-d1df107b4f3c/xadepasatiben.pdf
    • http://mogigavuxifiti.epizy.com/tokovulojuza.pdf
    • https://uploads.strikinglycdn.com/files/e6825377-9a85-46f5-adec-c1338775b23f/lojufazagil.pdf
    • http://lopibed.epizy.com/taylor_weight_scale_reset.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010486.bin
303c2e353ae811e5bd6a9b1ed35ac690a89f79b1235a9f1a4935db2d0ae54fd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 5536 bytes
font_01_sfnt_off00011750.bin
f7038aaf648b2c550cbd3a94d20dedb8f709c77bf29a15e177b327a4cc9e7fbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11750 11356 bytes

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