Malicious PDF — malware analysis report

Static analysis result for SHA-256 80871794e648f4c9…

MALICIOUS

PDF

98.9 KB Created: 2021-03-15 22:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adef0faec13a040bbe0d4c932c27c1df SHA-1: 0d17f008040bfe41e88b5076b0dca0bcb662c1e0 SHA-256: 80871794e648f4c9c2036a99b651469b85a5650bd851a0c6961c311805b3a11a
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that was flagged by ClamAV as Pdf.Phishing.Trojan. The presence of the SE_PASSWORD_ARCHIVE_LURE heuristic indicates that the document likely contains instructions to decrypt a password-protected archive, a common tactic to evade security controls. An external URI pointing to 'kuzutuzo.ru' was also observed.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://kuzutuzo.ru/wix?keyword=clave+de+sol+notas
    • http://jekenufakewe.mypressonline.com/kogeme.pdf
    • http://fosuxevudutuviv.22web.org/wolosironowogaw.pdf
    • http://lumufurisazela.mywebcommunity.org/kogus.pdf
    • https://cdn.sqhk.co/mujekesire/hbidifG/57808610893.pdf
    • https://cdn.sqhk.co/fuxuduxexi/idgjqwY/73699883878.pdf
    • https://cdn.sqhk.co/korulifesewa/jcLvjgK/gepirakuvikepupoveg.pdf
    • http://gaxenop.medianewsonline.com/52380622771.pdf
    • https://cdn.sqhk.co/xasurila/fn8LibB/talking_puppy_dog.pdf
    • http://kumorafeg.iblogger.org/gijup.pdf
    • https://cdn.sqhk.co/potasuregoz/D5iamxp/sparkling_mineral_water_vs_spring_water.pdf
    • http://wegolurubakisud.22web.org/vepatejufebajanifusima.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a9507091-6a82-4a99-ac94-9fb8f67bcf95/sagedajajizemozit.pdf
    • http://kugaxupupoguj.rf.gd/1279594226.pdf
    • https://uploads.strikinglycdn.com/files/7cd685c1-45b0-4bd1-afd0-46d8d8ac4485/soxavitasowol.pdf
    • https://uploads.strikinglycdn.com/files/5cb0fb8e-98ac-48fd-a148-6cebaf4c9efd/86404501750.pdf
    • http://lebusepuwiri.atwebpages.com/advertising_and_sales_promotion_in_marketing.pdf
    • http://jolagafo.rf.gd/25574562066.pdf
    • http://fibubaxuvuvixik.epizy.com/26083259764.pdf
    • https://uploads.strikinglycdn.com/files/e17c93a0-636e-45aa-a8d4-56ec1c3c8202/the_holy_quran_english_translation_by_maulana_muhammad_ali.pdf
    • http://fofogagad.epizy.com/76826705207.pdf
    • https://uploads.strikinglycdn.com/files/27e3a533-e5c2-4c25-9d6b-72bc74d96388/38758794965.pdf
    • http://kavimefejemud.rf.gd/audio_editor_free_for_windows_7.pdf
    • https://uploads.strikinglycdn.com/files/c7fae6e2-f959-4fe2-a2c6-a83f75544184/6445617790.pdf
    • http://pemukusa.epizy.com/43967190887.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012fb8.bin
078be862716b63879294ac5e0b7ebe33e9de76c45e656fdc142ae72f17950b52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB8 4688 bytes
font_01_sfnt_off00013fbb.bin
0db3196394fffd38a095b28202ac4840da746bdf96e9fc2fdcc70596674eaecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FBB 12580 bytes
font_02_sfnt_off000168af.bin
eb8728b209634f5cf0dcbccd801eedbe8bc3f4553844c4955f61b377f7da468a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x168AF 16200 bytes

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