Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d646410f405443…

MALICIOUS

PDF

81.5 KB Created: 2021-03-18 03:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67b12504f92cbb71b2ae6147e5610b3d SHA-1: d066a43c2320f0d9c25439ace3bcc2eccbbfec17 SHA-256: f7d646410f405443de7d4f4894bb68e1f7d1ec02b17d305528207a397a2a9d4f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure, asking a question to entice the user to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=how+do+you+drink+crown+royal+black
    • https://cdn.sqhk.co/xeloxilava/Phoieji/49589766030.pdf
    • http://zebarugusi.22web.org/what_is_transition_curriculum.pdf
    • https://cdn.sqhk.co/difigobon/hbthcLx/miraculous_ladybug_season_4_episode_1.pdf
    • https://static.s123-cdn-static.com/uploads/4466153/normal_60003c1463898.pdf
    • https://cdn.sqhk.co/gixedomawa/VhjaS7R/dinosaur_simulator_value_list.pdf
    • http://dresdenpharma.ru/fewirisanugeloxipoxeta8c4wz.pdf
    • http://50offit.pro/nazosamuzorugiwefilenojxwg04.pdf
    • http://opensalon.xyz/43770764681gl1ye.pdf
    • http://bojukekaj.66ghz.com/arcsoft_panorama_maker_5_pro_free.pdf
    • https://cdn.sqhk.co/kawinojos/ep90Qjb/13966653224.pdf
    • https://cdn-cms.f-static.net/uploads/4405639/normal_6043dcefa7553.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pobutimakivuxeg.rf.gd/how_to_write_a_warning_letter_to_an_employee_for_absenteeism.pdf
    • http://bibikefogive.epizy.com/asisa_cuadro_medico_cadiz.pdf
    • http://woxutonugosafer.epizy.com/51677892837.pdf
    • http://wuxipuretox.rf.gd/fopedop.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_off000100e2.bin
0c308a28f1c55ac75000a47d327210728c9c5b1a6f7ac06d092269540c5258b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100E2 5112 bytes
font_01_sfnt_off0001126c.bin
91b13e36ffccb38c12eebe4071df153b88f3532b5f5ab699cdbe7c568c67201e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1126C 10956 bytes

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