Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49ac7a3ea9361c4…

MALICIOUS

PDF

76.3 KB Created: 2021-03-15 06:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e70e9164532fdf07c0268b23d3501e7a SHA-1: c422be33331d4ce6fe92e19eaf7d149809bf2a7c SHA-256: f49ac7a3ea9361c45a80c59c38d74bb87b21ed20e1897e94de615284403e2891
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 0.8829

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://xezojetit.ru/award?keyword=brain+games+for+dogs+pdf PDF link annotation
    • https://lajawirefif.weebly.com/uploads/1/3/4/8/134869340/9023225.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/befc3f06c69.pdfIn PDF document text
    • https://zatofurepodato.weebly.com/uploads/1/3/1/4/131482853/58692a56cc7.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/gavijasiw-rosojejelowov-besijipe-gibame.pdfIn PDF document text
    • https://lofativunami.weebly.com/uploads/1/3/4/5/134581692/66703.pdfIn PDF document text
    • https://lurufabufukigo.weebly.com/uploads/1/3/1/4/131407807/04a53b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_6042f3714e3dc.pdfIn PDF document text
    • http://zowuzigokov.22web.org/judel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6032f34aac967.pdfIn PDF document text
    • https://xejotonevuxujuj.weebly.com/uploads/1/3/1/3/131379732/ketesumug-lesebefosabaje-pagimomuvile-xepufizupobu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pojafuda.rf.gd/free_nautical_charts_uk.pdfIn PDF document text
    • http://pumesomomibap.rf.gd/cambridge_checkpoint_english_teacher_s_resource_book_2.pdfIn PDF document text
    • http://gurisitubonofa.epizy.com/presentation_templates_keynote.pdfIn PDF document text
    • http://jonukufazok.rf.gd/89489439508.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/autodesk_autocad_2010_with_crack.pdfIn PDF document text
    • http://xafamikipu.epizy.com/southampton_maps_and_visitor_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/hde_ergonomic_bluetooth_mouse_manual.pdfIn PDF document text
    • http://nunemasagabegu.rf.gd/how_much_is_an_ipod_mini_worth_now.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/fidajirikemenixelizulu.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/9997733378.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/vominofosofovabeziwomuro.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEF 5380 bytes
SHA-256: bfeef963407f9c36997c39fcec7c54f4418182a6a97235ec5ad76805d8d8a30b
font_01_sfnt_off00011026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11026 10488 bytes
SHA-256: ee1d601dc7c5fe72ff267952aa113e40b859daa720ece617c76526440e7f47e6

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