Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7709c35d93ab6a8…

MALICIOUS

PDF

73.4 KB Created: 2021-03-16 00:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 348d98ad4cbf19b23f6ec2f96aa9160e SHA-1: e3b31caa33cda669b4428bf7915672a12e84bfb3 SHA-256: c7709c35d93ab6a813cc2bac8899278ee1985ded6ee89980e8c971c568a42905
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'zajinet.ru', which is likely part of the phishing lure. The document body, though heavily obfuscated, contains keywords related to the URL, suggesting an attempt to trick the user into visiting the malicious site.

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://zajinet.ru/wix?keyword=livingston+transfer+station
    • https://cdn.sqhk.co/tixunudixa/jj2he0k/zogafezilezoramib.pdf
    • http://gedawuxofawu.iblogger.org/avatharam_malayalam_movie_400mb.pdf
    • http://nukapag.getenjoyment.net/botulismo_bovina.pdf
    • https://cdn.sqhk.co/vinasujitupe/AifjePr/strategic_leadership_style_test.pdf
    • https://cdn.sqhk.co/xenudipu/gfhf4jb/pictures_of_zee_tv_actress.pdf
    • https://cdn.sqhk.co/sovokeduseb/WSMxPOq/heart_3d_printer_thingiverse.pdf
    • https://cdn-cms.f-static.net/uploads/4384649/normal_6033bb7878453.pdf
    • https://cdn-cms.f-static.net/uploads/4485693/normal_6026bf5589aea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_ab5f4c7349b141879fe2c19fed78ff50.pdf?index=true
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_066d5d6b6b074d46b3ccd1db0b7ba3aa.pdf?index=true
    • http://vavesimor.epizy.com/dragon_age_inquisition_mage_specializations_guide.pdf
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_0321703b776e4388a02df62ff6f70c5d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/795bbcc9-9909-458e-ba49-fef8f323a832/opel_corsa_c_workshop_manual.pdf
    • https://uploads.strikinglycdn.com/files/01b1d805-2c02-4c77-bfe8-3705bf60b94e/what_are_smaller_units_of_length.pdf
    • http://gevejonitu.onlinewebshop.net/51037388142.pdf
    • https://uploads.strikinglycdn.com/files/2249c512-4e5d-4d99-9b7b-97e838e6477f/kekiwidorurijaz.pdf
    • http://bidetorula.rf.gd/ivanti_security_control_installation_guide.pdf
    • https://uploads.strikinglycdn.com/files/a76e25e4-b7ed-4b84-9dcd-1cf55280cde6/frigidaire_ffad5033r1_50_pint_dehumidifier_canada.pdf
    • https://uploads.strikinglycdn.com/files/787a78b9-ec31-4c04-a130-2016e4d13065/22420585143.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_off0000e139.bin
82f57dfd2f0712dc4ac13fed6b06537594382805b6f9045da812f83d38859311
pdf-font-stream PDF embedded font (sfnt) at offset 0xE139 4904 bytes
font_01_sfnt_off0000f20b.bin
602f73be7305890065cdaeaab35280c88066d1e5b22ac8c8f0256ffddf33a828
pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 11348 bytes