Malicious PDF — malware analysis report

Static analysis result for SHA-256 4624d4775ba11f43…

MALICIOUS

PDF

65.6 KB Created: 2021-02-23 22:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 283b28441a0254e7666fd803120af7f8 SHA-1: 6db6efe6ec085cd47a8ebbb7ef70f91f48552e9f SHA-256: 4624d4775ba11f43cfea86b60d3ff89279a98505d048012550bb6e5cda941278
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, with one prominent URL pointing to 'jottigo.ru', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to fixing audio lag on a Sony TV, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7722

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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+fix+audio+lag+on+sony+tv
    • http://mifudubesesul.iblogger.org/brandon_bernard_last_words_full.pdf
    • https://cdn-cms.f-static.net/uploads/4454556/normal_60283a5baf689.pdf
    • http://puwisagoki.22web.org/maquinista_tren_formacion.pdf
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fc58638b13dd.pdf
    • https://cdn-cms.f-static.net/uploads/4409107/normal_60150da93fae2.pdf
    • http://idealica-itufficiale.website/el_hombre_como_unidad_biopsicosociali7hqz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://taperimogitunal.epizy.com/is_brawlhalla_cross_platform_on_xbox.pdf
    • http://gavenivifi.rf.gd/crossword_clue_brilliance_in_performance_7_letters.pdf
    • http://lufafutogixafu.rf.gd/arnuity_ellipta_prescribing_information.pdf
    • http://nabikelotedabe.epizy.com/second_conditional_reading_comprehension_exercises.pdf
    • http://suwuwigo.rf.gd/vibesuxotaseketakob.pdf
    • http://xuwugufufokiti.epizy.com/organelas_celulares_e_suas_funes.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d210.bin
b6285191817b8b59cb8ad6e5c2c4aafcd2b6a8374f4b0598f91b00c5a2c25384		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD210 5264 bytes
font_01_sfnt_off0000e432.bin
aa98db3836b013be833745060825ebcfca7fccd7261da39fe0589a51cb987bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE432 11224 bytes

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