Malicious PDF — malware analysis report

Static analysis result for SHA-256 c030f4768236de7b…

MALICIOUS

PDF

73.7 KB Created: 2021-03-12 09:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 127708c669dd3f76d32b38186858d044 SHA-1: 2f796b49fee0224c9ddc809fc00211185b8a180a SHA-256: c030f4768236de7b39da1ce8160cf9fe7358ee2d08b9245e6f44387ecb448f7c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a generated document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=wrought+iron+table+legs+uk
    • http://genoray.pro/zesedadikizosapoxus8e2km.pdf
    • http://jorowijedo.mywebcommunity.org/how_long_do_you_charge_simplehuman_mirror.pdf
    • http://poguzozod.sportsontheweb.net/73993340902.pdf
    • https://lidelituni.weebly.com/uploads/1/3/1/4/131452972/watepofuwuzi.pdf
    • http://kudopifupelixi.22web.org/agriculture_and_rural_development_study_material.pdf
    • http://bet-info.ru/internal_auditing_assurance__advisory_services_4th_edition_solution_manual72285.pdf
    • https://kimuximufa.weebly.com/uploads/1/3/4/1/134132687/7e66f7.pdf
    • https://cdn-cms.f-static.net/uploads/4475853/normal_6045fc8ca3c4b.pdf
    • https://static.s123-cdn-static.com/uploads/4402246/normal_5fe365721ca7e.pdf
    • https://static.s123-cdn-static.com/uploads/4492574/normal_5ff858496ff69.pdf
    • https://wojewifonutej.weebly.com/uploads/1/3/4/8/134883442/zawetuximuja.pdf
    • https://cdn-cms.f-static.net/uploads/4374520/normal_6039791edb8ed.pdf
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/b4a4a9f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bimomog.rf.gd/codycross_answers_group_42.pdf
    • http://pulutugorivexek.atwebpages.com/project_management_tools_and_techniques_list.pdf
    • https://uploads.strikinglycdn.com/files/f32a3494-2585-4fb6-9d54-7efdead54336/bifemabevawovaxewififun.pdf
    • https://uploads.strikinglycdn.com/files/88e860d4-95c6-44ab-8f93-92264330eb52/best_c_book_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/dac9b184-bdd3-473b-9598-f4359f5a5f3e/what_type_of_spark_plug_does_a_briggs_and_stratton.pdf
    • http://sawuliwinupunud.epizy.com/why_do_jehovah_witness_not_celebrate_holidays_and_birthdays.pdf
    • https://uploads.strikinglycdn.com/files/a33288ba-4cec-4afb-8b59-9e678de5e265/34740835840.pdf
    • https://uploads.strikinglycdn.com/files/5befde17-8508-495f-96b0-4117bc5e7fe9/latest_news_on_metroid_prime_4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d4.bin
3da78bc539c36158ef64cf68050a5b7508c70072f7504a6cdc3c72839fa28c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D4 5044 bytes
font_01_sfnt_off0000e502.bin
488b15fecd90b9b7b8235c2c191bd935c15258a61273db02ed6a77ce78266211		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE502 10604 bytes
font_02_sfnt_off0001097d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1097D 4324 bytes

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