Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c4d0e4471a5840…

MALICIOUS

PDF

55.7 KB Created: 2021-06-06 16:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 75a82104011c64fe808f1013c0a7b20c SHA-1: 83f0393b50261309926501f9420cd3f50138bc34 SHA-256: 42c4d0e4471a5840cda6f189f3f89847f5778c068d315f9815252503a61cfac3
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.7049

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://smidgel.ru/pbw?utm_term=delta+shower+cartridge+replacement+home+depot PDF link annotation
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/gewobetiz.pdfIn PDF document text
    • https://tewijudejasivi.weebly.com/uploads/1/3/2/6/132682467/vogumob_vutikisoteteb.pdfIn PDF document text
    • https://muberelikaxisax.weebly.com/uploads/1/3/1/1/131163953/wezawegiverevowobig.pdfIn PDF document text
    • https://zimavilagapiwe.weebly.com/uploads/1/3/2/7/132712623/bakivobogik_gaboxasuk_nokiwilalogim_sudavijugeno.pdfIn PDF document text
    • https://lezogifivejuz.weebly.com/uploads/1/3/2/6/132682585/4689190.pdfIn PDF document text
    • https://namazowofurap.weebly.com/uploads/1/3/4/3/134372349/971209.pdfIn PDF document text
    • https://viweruvuwoloti.weebly.com/uploads/1/3/4/5/134577653/2267c.pdfIn PDF document text
    • https://wojatobarub.weebly.com/uploads/1/3/4/6/134612389/mapexijifetepor.pdfIn PDF document text
    • https://pewaruraxifazof.weebly.com/uploads/1/3/4/3/134340131/5391569.pdfIn PDF document text
    • https://vataviborabedim.weebly.com/uploads/1/3/4/0/134012391/7977446.pdfIn PDF document text
    • https://lawukexudemodu.weebly.com/uploads/1/3/4/0/134041757/zasumebozu.pdfIn PDF document text
    • https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/jodusonajileran.pdfIn PDF document text
    • https://dukalafaziwemum.weebly.com/uploads/1/3/4/7/134772398/kifeniwumejurogase.pdfIn PDF document text
    • https://tabikajodunel.weebly.com/uploads/1/3/0/7/130739544/petunanakil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ganosidil.pbworks.com/w/file/fetch/144453219/what_are_the_characteristics_and_pros_and_cons_of_critical_path_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62320c6c-6617-4ef9-8300-2ac67a459f6f/42re_transmission_rebuild_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ccdf364-914a-4bf3-80c9-2f3b34cc73da/2010_chevrolet_malibu_recalls.pdfIn PDF document text
    • http://najajadux.pbworks.com/f/muvilunapurebaxizit.pdfIn PDF document text
    • http://fixunomavow.pbworks.com/w/file/fetch/144712362/facebook_marketplace_furniture_scams.pdfIn PDF document text
    • http://garigor.pbworks.com/f/vivafu.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144413985/taminegavowejunoj.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/11912493600.pdfIn PDF document text
    • http://bopelijexuf.pbworks.com/f/gutabetepiloxijoxut.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5D 5576 bytes
SHA-256: c0c91e6144a28db63f8547ebf99664aa38954c1855f13cf4ac1fe9dd50e5ac52

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