Malicious PDF — malware analysis report

Static analysis result for SHA-256 23592e31b0c6f1c4…

MALICIOUS

PDF

74.7 KB Created: 2021-03-11 09:20:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 18bd111d064f7f0ce2d1a1fe7aebd774 SHA-1: 2875bfa2799cb0538f8c4c8febc771a604ddaeb8 SHA-256: 23592e31b0c6f1c46d4fffe164f2a1bce017e8cfe388b3035b03cfd896fb1dff
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as potentially malicious or phishing-related. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection further support the malicious nature of this file, suggesting it's part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8945

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
  • 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://soxebez.ru/award?keyword=appellate+jurisdiction+act+tanzania+pdf PDF link annotation
    • http://dapovevi.mywebcommunity.org/banking_exams_questions.pdfIn PDF document text
    • http://xeratigike.medianewsonline.com/87191862922.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/the_princess_diarist_carrie_fisher_audiobook.pdfIn PDF document text
    • http://tevituvodejifep.mywebcommunity.org/foworodubebagu.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/how_do_i_charge_my_zagg_rugged_messenger_keyboard.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/pr_system_one_remstar_60_series_pro_cpap_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/naruxibe/iZOGehf/dajifofodil.pdfIn PDF document text
    • https://cdn.sqhk.co/gekobegij/4PGohhZ/pevalalamebezirim.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/nojik.pdfIn PDF document text
    • https://cdn.sqhk.co/xedomobedusi/Uhd1jd9/kuwabedafiwux.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwewiwudesi/hfBjbha/amazon_movie_prime_free_trial.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/47911801767.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rususekobijo.myartsonline.com/delonghi_pinguino_4_in_1_portable_air_conditioner_14000_btu.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/panasonic_cordless_phone_batteries_ni-mh.pdfIn PDF document text
    • http://regujivabi.rf.gd/sye_raa_narasimha_reddy_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/buwatamugekitokekibap.pdfIn PDF document text
    • http://vikipabolukizi.rf.gd/stihl_chainsaw_manual_036.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/pebote.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 5264 bytes
SHA-256: 46f394fa2a3e3fd8d111a072b40410be75bab24a319d8be0a68cc48be20d75e9