Malicious PDF — malware analysis report

Static analysis result for SHA-256 899c30e177983c99…

MALICIOUS

PDF

73.0 KB Created: 2021-03-22 04:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f30978c24cafec7c2eb756be8024821e SHA-1: fcb86f21c68730718619f11b0db360dd66b0618a SHA-256: 899c30e177983c99e9632438cfc7714fd08c4e97664eb11e8f695097cb5e673e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to an 'answer key', likely intended to trick users into visiting the malicious URL for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/wix?keyword=acids+bases+and+salts+cloze+answer+key
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fcdb35c20e66.pdf
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5ff75d089b86b.pdf
    • https://cdn-cms.f-static.net/uploads/4454049/normal_602c58bbe6fe8.pdf
    • http://fubewakixodi.22web.org/49860585266.pdf
    • https://static.s123-cdn-static.com/uploads/4412902/normal_5fc64a1fba894.pdf
    • http://xawikeroteguvu.iblogger.org/netorirorijifezimid.pdf
    • https://cdn-cms.f-static.net/uploads/4466996/normal_604a157eaace2.pdf
    • http://bigowet.xyz/biweekly_payroll_calendar_templateo604i.pdf
    • https://static.s123-cdn-static.com/uploads/4392660/normal_5fee2b5ff294e.pdf
    • http://vinnipoh.fun/ludulewowopiluxujuwogac6xb5.pdf
    • http://cashfree.store/ranunuvutetunukajutg2f51.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/443fc891-070e-4207-9303-e6f4723360cb/lost_sea_ps4_gameplay.pdf
    • http://mokuzamiwebifet.epizy.com/38366120466.pdf
    • http://girinuluzu.rf.gd/korumufazexivefoxaved.pdf
    • https://uploads.strikinglycdn.com/files/fda374f3-e29a-4add-9a4e-88379aa4347b/dark_sunset_wallpaper_hd.pdf
    • https://uploads.strikinglycdn.com/files/e7a4c381-1925-455d-a24a-ffe1a7ec6e2d/sumomoxuwoditesiregivarik.pdf
    • http://didaduxazej.epizy.com/kemusowonomigujadevedeti.pdf
    • https://uploads.strikinglycdn.com/files/db3791dc-d2db-4523-9b8c-f88c2ab566ed/xfinity_tv_app_connection_error.pdf
    • http://furofazitogo.epizy.com/kim_kardashian_hollywood_pet_guide.pdf
    • https://uploads.strikinglycdn.com/files/5982e082-5d0e-40e9-bc8c-ad854a3d5fb2/what_are_the_4_types_of_interpersonal_communication.pdf
    • http://togalufunepobaz.rf.gd/malaguena_salerosa_sheet_music.pdf
    • http://divifafapinuk.rf.gd/22313495610.pdf
    • http://bemuvubovewe.epizy.com/brain_teaser_printable_sheets.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_off0000d70f.bin
c47328b99d1a8106722297ddf3976446a0c29354b3be907203f77db8ad888c37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD70F 1684 bytes
font_01_sfnt_off0000df74.bin
80535f09cbee698ed3932b2aef887843759c3a22493ca73055a2418951263e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF74 5368 bytes
font_02_sfnt_off0000f1e4.bin
3a131884026e497ddff4a81f3b869f1a7d2307e848b8f8f6e4cb690edcb0e76a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 10688 bytes

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