Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2f2b637a9daa41…

MALICIOUS

PDF

74.6 KB Created: 2021-03-04 12:52:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee34428e31885cc0ab84274ea3a54140 SHA-1: b1a3539dceb31381d29bbc4b6d18fb3ca2ea5f48 SHA-256: 1c2f2b637a9daa41e4a815126931a84d4504bb6731bf76e35bc8b4f3db3839b1
96 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with one specifically pointing to a suspicious domain that likely hosts a phishing page. The PDF structure and embedded content suggest it is used as a lure to redirect users to malicious websites, likely for credential harvesting or malware distribution.

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://jacksth.ru/123?utm_term=how+to+love+thee+analysis
    • https://cdn.sqhk.co/letijefa/agzhc8r/tofamikuvewazeji.pdf
    • http://degitowexara.iblogger.org/coliformes_termotolerantes_artigos.pdf
    • https://cdn.sqhk.co/muwanije/zLGW7jb/3393045374.pdf
    • https://static.s123-cdn-static.com/uploads/4369930/normal_5fcc54b6ac567.pdf
    • https://cdn.sqhk.co/visunexabore/ojhJEzk/ball-_hop_bowling_the_original_alley_roller_rink.pdf
    • https://cdn.sqhk.co/rewagujil/hajbCjf/bapemunipotinikepomad.pdf
    • https://cdn.sqhk.co/fojevimexu/ahcSjaN/60886723504.pdf
    • https://cdn.sqhk.co/jajotulix/jcnBxVb/endless_jungle_prince_run_game.pdf
    • https://cdn.sqhk.co/pugirunosamo/ifC7tje/madura_sinhala_english_dictionary_offline_free_download.pdf
    • https://cdn.sqhk.co/vetelovube/sg4ahaP/nawonijenebugukipi.pdf
    • https://cdn.sqhk.co/parikozug/WcsIBih/vovarituvururakek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kujofumuv.rf.gd/74023138834.pdf
    • http://doriponesarom.myartsonline.com/the_book_of_yeezus_a_bible_for_the_modern_day.pdf
    • http://tavoxelelenasi.onlinewebshop.net/vabef.pdf
    • http://nuvelerejide.rf.gd/how_to_start_collecting_contemporary_art.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98a.bin
ac0e6b72398afdf0b13d07b540574834d63ca685df2ae59bb47c77f13285d254		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE98A 4892 bytes
font_01_sfnt_off0000fa44.bin
6b6da065280f0a0ad976fa8d5a7bf8d27ea5b90801af56d3d2e12259b0064a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 10368 bytes

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