Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc3e7ded2fc17ff…

MALICIOUS

PDF

67.7 KB Created: 2021-06-12 12:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d012df441e9fb4ac81d7c99e252841c3 SHA-1: 1831b6924af39b6652579e2efb04cf93964c9265 SHA-256: 4dc3e7ded2fc17fffe7b301cc6d479f0fb99eecd167cdbb613989606bcb68159
124 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.8224

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/pbw?utm_term=problem+and+solution+text+structure PDF link annotation
    • https://surejijal.weebly.com/uploads/1/3/4/5/134525532/4765700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498834/normal_603a2521ca39e.pdfIn PDF document text
    • https://koxalisibigemig.weebly.com/uploads/1/3/4/8/134854932/7946295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_6067c6554512d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_60543c0497677.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377403/normal_5ff17a9257f61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_602812af415ea.pdfIn PDF document text
    • https://pefikasulanak.weebly.com/uploads/1/3/4/3/134350375/nodel_kamab_rinozibor_watis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5fdff00382ef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424632/normal_6069c47511a9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jitijaloj.pbworks.com/w/file/fetch/144578358/how_to_replace_rotted_joists.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/w/file/fetch/144843048/what_does_ticonderoga_mean.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/w/file/fetch/144839370/junooniyat_movie_download_mp4moviez.pdfIn PDF document text
    • http://sovafiben.pbworks.com/w/file/fetch/144558360/kiguta.pdfIn PDF document text
    • http://juzifezazuk.pbworks.com/w/file/fetch/145176678/xipikatolituxoxuwinilo.pdfIn PDF document text
    • http://fuvuxagola.pbworks.com/w/file/fetch/144602559/pigefinosofeviguvoz.pdfIn PDF document text
    • http://gijorugisaw.pbworks.com/f/logo_animation_in_after_effects_torrent.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/w/file/fetch/144585261/how_long_is_it_safe_to_take_imodium.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/f/77324227122.pdfIn PDF document text
    • http://gonikob.pbworks.com/w/file/fetch/145064367/95789665577.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_off0000db4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4B 5292 bytes
SHA-256: fd64d45a75aa975977ec8178054561f59419d062e684c81512b495849f116076
font_01_sfnt_off0000ed2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2D 10556 bytes
SHA-256: 1a808bc042e70e1921e08722c90331a2715b958216b2937fe70055c6c21bfc98

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