Malicious PDF — malware analysis report

Static analysis result for SHA-256 1271929640c51bae…

MALICIOUS

PDF

67.0 KB Created: 2021-05-14 14:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5c57ca111c59d950adb80e4320e0789f SHA-1: a5afacf5f5eef9b08564fa730d8c5e3d3a480bf5 SHA-256: 1271929640c51baedee53167adbd70c61ec6aeeefdca818963b5ab53f4da0b39
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9706

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://seumenha.ru/strik?utm_term=what+kind+of+oil+does+a+2001+honda+accord+take PDF link annotation
    • http://custits.space/futipumuzivinimulolo35hzw.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/beowulf_new_english.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/cjjgdEo/70013309138.pdfIn PDF document text
    • http://wivadanege.iblogger.org/zojenusifavut.pdfIn PDF document text
    • http://twirlini.com/zifurefebuj6x9a.pdfIn PDF document text
    • http://unlockdeals.shop/684061514616tv3v.pdfIn PDF document text
    • http://zozitaze.mypressonline.com/604217286.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/fMM3vdU/all_college_football_scores_2020.pdfIn PDF document text
    • http://sunipemumax.66ghz.com/standard_operating_procedure_of_autoclave.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radikabo.rf.gd/68511651392.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/fagot.pdfIn PDF document text
    • http://xadaguxo.rf.gd/articulaciones_sinartrosis.pdfIn PDF document text
    • http://rovatidakenaj.rf.gd/pebifigupotojijoxen.pdfIn PDF document text
    • http://kuzibawo.rf.gd/nanuzezavuziwimusixoxiru.pdfIn PDF document text
    • http://raxegujanamefas.atwebpages.com/exercice_corrig_sur_l_atomistique.pdfIn PDF document text
    • http://jazopizebe.atwebpages.com/34491280828.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_off0000ef73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF73 5300 bytes
SHA-256: 9f6c938fdccb395749028c96f7cebe1d3c958edc69071c4afb3bd7993a2d8905

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