Malicious PDF — malware analysis report

Static analysis result for SHA-256 229393d5ee79821a…

MALICIOUS

PDF

73.6 KB Created: 2021-02-28 03:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9c03dee0b8fa3930a44b597e8fd973b1 SHA-1: dd3031683a4830daece2031676b80446fdebb7ca SHA-256: 229393d5ee79821a0709456c1f43f2a64aa36487f6161b128e916126ba9ec4c8
126 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. The document body, though heavily obfuscated, contains references to 'aci 301-05 pdf free download', suggesting a lure. Numerous external URLs are embedded, many pointing to disposable hosting and link farms, indicating a likely attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=aci+301-05+pdf+free+download PDF link annotation
    • https://tejenopaje.weebly.com/uploads/1/3/1/1/131164027/xogef_fewepomex.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/cyberpunk_2077_ps4_controller_issues.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/2613317.pdfIn PDF document text
    • http://realwockyc.info/zilibimukalikolad5qvl.pdfIn PDF document text
    • http://korsabarca.com/megan_rapinoe_wifeo2q42.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/how_to_change_my_verizon_jetpack_password.pdfIn PDF document text
    • http://pedalini.club/31032020798u2j7k.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/OhGhjia/epic_games_fortnite_mobile_download_ios.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/9046392.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/introduction_to_psychology_textbook_free.pdfIn PDF document text
    • https://sesirolomozanu.weebly.com/uploads/1/3/2/7/132741009/802f804c663c02.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/71959721734.pdfIn PDF document text
    • http://retys.fun/tumse_badhkar_duniya_mein_mp3_song_dmyv29.pdfIn PDF document text
    • http://yandex-dostav.ru/minecraft_enchanting_guide_1._13iu8ya.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/how_to_address_a_letter_to_the_school_board.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD215 3992 bytes
SHA-256: 8c33bff914b626276743756520bd5ac1bd8ca5a149c1aa3612648f3d50fe1841
font_01_sfnt_off0000e046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE046 5564 bytes
SHA-256: 427975e9a72c5fccfb81c5d4fef95b1ee4c5992eca79f1d9aebbd66c7bfa4e5b
font_02_sfnt_off0000f36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36D 10744 bytes
SHA-256: cc7c9eb59c9bbd7f949e5da8306278514b64fd03aca29ea90351a25b880d925d

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