Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb26703bbca5bc85…

MALICIOUS

PDF

78.7 KB Created: 2021-03-20 19:31:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea0eec90cd0506924fc1feca22de367d SHA-1: 5bdf12f867303435dabdf7370fb2079d4d713b9b SHA-256: cb26703bbca5bc85caf7d3aa2577b599b7809763576ccb7997953e0a8749a7a4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://jottigo.ru/strik?utm_term=how+to+set+my+capello+clock` is the primary indicator of compromise, suggesting a phishing or malware delivery attempt. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs are consistent with common phishing lures.

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://jottigo.ru/strik?utm_term=how+to+set+my+capello+clock
    • https://cdn.sqhk.co/xufaribo/Tsgiq4O/hp_smart_tank_515_e3_error.pdf
    • https://cdn.sqhk.co/dixejetafap/diizCDH/speedball_ink_drying_time.pdf
    • https://cdn.sqhk.co/satumunesar/hhgUife/gelofawo.pdf
    • https://cdn-cms.f-static.net/uploads/4426408/normal_6014323cddddd.pdf
    • https://static.s123-cdn-static.com/uploads/4449766/normal_6004bd690f318.pdf
    • https://static.s123-cdn-static.com/uploads/4487416/normal_5fc671dfb1151.pdf
    • https://cdn.sqhk.co/pifizumux/bB0zijh/70401517379.pdf
    • https://cdn-cms.f-static.net/uploads/4387706/normal_60557b41e3d79.pdf
    • http://reguvixelupuj.iblogger.org/quran_with_translation_book.pdf
    • https://static.s123-cdn-static.com/uploads/4452157/normal_5fc7e203634c2.pdf
    • https://cdn.sqhk.co/jigitovewuk/bSJuBbQ/planet_wars_hacked.pdf
    • https://cdn-cms.f-static.net/uploads/4454436/normal_604ad5340ac50.pdf
    • https://static.s123-cdn-static.com/uploads/4491969/normal_5ffba4ce57c0d.pdf
    • https://cdn.sqhk.co/lepagesali/gjsojeG/game_maker_studio_2_free_2020.pdf
    • https://cdn.sqhk.co/ragejeli/bRgh4jc/stickman_world_war_2_games_xbox_360.pdf
    • https://cdn-cms.f-static.net/uploads/4452861/normal_601b6500d7776.pdf
    • https://cdn-cms.f-static.net/uploads/4369493/normal_604905c10e278.pdf
    • https://cdn.sqhk.co/genonitag/Ijel5Bn/orange_tree_resort.pdf
    • https://cdn.sqhk.co/takivelalam/8gihajh/febavejamagaduzinoz.pdf
    • https://cdn.sqhk.co/melipetoluf/GRDjjhc/lasuvabat.pdf
    • https://cdn.sqhk.co/losomilodip/ii5f2ii/secadora_brastemp_ative_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4393016/normal_601450b962101.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tudozujuxijoz.rf.gd/the_ruins_of_gorlan_pages.pdf
    • http://jodonurinifos.epizy.com/film_besharam_full_movie_mkv.pdf
    • http://duxuramubot.epizy.com/deregewek.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_off0000e8d5.bin
3130b3f4dfc5bd7d897d99ef0b7d1454299645992f074047b452815a078cfdcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D5 4836 bytes
font_01_sfnt_off0000f967.bin
b224b4e984e5fe752516e4e04367fc5f7862b914535d752f9f21b6f8865fbdb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF967 10880 bytes
font_02_sfnt_off00011eae.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAE 4324 bytes

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