Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9dad7d130dff02…

MALICIOUS

PDF

65.4 KB Created: 2021-03-04 06:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9bf79754db44f74ea30acc7a9eb8889d SHA-1: 3d428863763a4fa768b36dfb1f90c5a4f6b0593f SHA-256: 4a9dad7d130dff02f6a5d72c13efe17a50ddc74af7956f95e0af47cdf5097402
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8232

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://botokaw.ru/award?keyword=infinix+note+9+price+in+nigeria+slot PDF link annotation
    • http://atomyimperial.ru/1059582814139r6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_6020ba3e048ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5feb4a6620c05.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/cIDvgcq/sabelovuxep.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/90528831499zaia2.pdfIn PDF document text
    • http://rodina38.ru/memedumoratugerhfxl3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_6017c2ff213b4.pdfIn PDF document text
    • http://moscow-siberian-force.online/the_missing_link_movie_2018_trailers68yd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500200/normal_6015ebe4b5e5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bakenexiradofo.epizy.com/everton_injury_report.pdfIn PDF document text
    • http://nejidaveza.rf.gd/at_t_wifi_calling_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/adobe_scan.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_off0000ef84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF84 5344 bytes
SHA-256: 3a7c834ae4ac1d10fa6c84b345ec938817d28a43f20b799cc406dd09a8ed055e

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