Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9797a75b65d2100…

MALICIOUS

PDF

64.0 KB Created: 2021-03-04 04:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c3f78ca8f95202ca879bcf989b598ad5 SHA-1: ac20f479f3955882f0d9a6d51f388713dc16ff66 SHA-256: e9797a75b65d2100b6df1680bd8163e4c2b9db6eaeeb8f9b4eef269937e92f15
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs that redirect through multiple disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using many distinct, low-reputation hosts, suggesting a link farm designed to obscure the ultimate destination. The ML classifier also flagged this PDF as malicious, reinforcing the suspicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9720

Heuristics 3

  • 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=annie+baker+john+summary PDF link annotation
    • http://zapixexarepol.medianewsonline.com/bowom.pdfIn PDF document text
    • http://xonigej.mypressonline.com/elenco_alimenti_fodmap.pdfIn PDF document text
    • https://jabibodusap.weebly.com/uploads/1/3/2/6/132681053/jogerotu.pdfIn PDF document text
    • http://eslivdrug.space/zebonixuw7mna.pdfIn PDF document text
    • http://zanartcc.net/xojevkpc07.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/97914528112.pdfIn PDF document text
    • https://xelinibi.weebly.com/uploads/1/3/0/7/130739371/5055733.pdfIn PDF document text
    • http://prizinsta.online/water_margin_tv_series_charactersdpkxu.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/naxifofibejozemoki.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/sandisk_clip_jam_bluetooth.pdfIn PDF document text
    • http://potolkilife.ru/short_vowel_sounds_worksheets_for_grade_50cx2b.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/14490410199.pdfIn PDF document text
    • http://bubble1.space/watadobutitasegudobjyjah.pdfIn PDF document text
    • http://francobusiness.com/12790437210aor1o.pdfIn PDF document text
    • http://samo-katim.ru/winopemek784c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitubak.atwebpages.com/tuvusisoxigudutebakevas.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_off0000e87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87E 5264 bytes
SHA-256: d97c458cd1d1cb3790f7fcfd4ed2f02d60c50f0ef2b0908fdd6cdd109bfad71a

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