Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3078a0e3fb7c64…

MALICIOUS

PDF

79.5 KB Created: 2021-03-30 22:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbf3a36a206b9c1c50b3213560ef5eaa SHA-1: ceeaf2c23cec161e6604e31dba55e0cd596432d0 SHA-256: ec3078a0e3fb7c6442bdbca93abadd0a9ba6c4d829ef65a0b547788985e0e122
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, disguised as a search result for a specific book. This strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of the file, indicating it's likely a phishing document designed to redirect users to malicious content.

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://nipisod.ru/wix?keyword=molecular+biology+of+the+gene+watson+4th+edition+pdf
    • https://cdn.sqhk.co/motuvitewodi/jdhhffW/hospital_adverse_event_reporting_form.pdf
    • https://cdn.sqhk.co/kowetitemaro/icihQgg/offroad_4x4_driving_simulator.pdf
    • https://cdn.sqhk.co/pefisemise/gjhggjz/33897106387.pdf
    • https://cdn.sqhk.co/nosimasiv/wruhjhc/80s-_90s_country_music_hits.pdf
    • https://cdn.sqhk.co/badaxiloru/qje8gfZ/66434556546.pdf
    • https://static.s123-cdn-static.com/uploads/4384050/normal_5fdd82f120ad7.pdf
    • https://cdn-cms.f-static.net/uploads/4405195/normal_6038e446e0e7f.pdf
    • https://static.s123-cdn-static.com/uploads/4384480/normal_5fcf0506e0037.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dafumuxitupav/zixorufikufenanokudizebo.pdf
    • https://s3.amazonaws.com/wuzalugiseto/messenger_for_desktop_windows_10.pdf
    • https://s3.amazonaws.com/xeruxaxer/39642433986.pdf
    • https://uploads.strikinglycdn.com/files/4fbc4207-fc17-4463-9bfb-9e4bec516d49/padojalus.pdf
    • https://s3.amazonaws.com/fewunadupop/29166172837.pdf
    • https://uploads.strikinglycdn.com/files/ee9ee94a-2049-4307-879e-6757b6bea4d0/pukuguzevekiviwukujebapo.pdf
    • https://s3.amazonaws.com/lovetijif/claro_reportar_telefono_robado.pdf
    • https://uploads.strikinglycdn.com/files/53abd463-5114-4cf1-9c71-19cbc1bee8a1/mors_kochanski_bushcraft.pdf
    • https://s3.amazonaws.com/legenapi/vedemonivugubabefifidowik.pdf
    • https://s3.amazonaws.com/vufuzewasi/luliboxuvebitibelepukik.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_off0000e9e0.bin
004746ff5ad725927dc2ee8b4dc1dc9b5fb7ccd4f5597bca6d87d5bbaa8fb43a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 5724 bytes
font_01_sfnt_off0000fd7b.bin
1dd6886b034c873737d4c5d907cdc04002881de68a56e275da46d02c8d277f2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7B 10812 bytes
font_02_sfnt_off0001227e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1227E 4324 bytes