Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdfa05e79811cd0…

MALICIOUS

PDF

65.3 KB Created: 2021-06-14 23:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c8fe3c665ff9ed3d8d6e823898406cfc SHA-1: 90f8110442d1a21773d46f01fa4dee2f1f392f52 SHA-256: 7bdfa05e79811cd0ed9f2b7590f3d85bd550e01b3a47f17d8197bb53d7d9b9dc
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 0.7994

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://catamma.ru/pbw?utm_term=logo+quiz+logo+23 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386347/normal_606b53ade7ecf.pdfIn PDF document text
    • https://vuvonuzomuvi.weebly.com/uploads/1/3/4/5/134508102/fimazanar.pdfIn PDF document text
    • https://dodivivedi.weebly.com/uploads/1/3/3/9/133997878/37cd20ffad2312.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/zapojugewosalif-vexexobumon-daramumoras.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486983/normal_604d0d5e3120c.pdfIn PDF document text
    • https://gemonozuwusub.weebly.com/uploads/1/3/4/1/134131657/446970.pdfIn PDF document text
    • https://buzubexod.weebly.com/uploads/1/3/4/0/134017192/kowop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452398/normal_6007451f54d2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fisagibop.pbworks.com/w/file/fetch/145096089/5655709181.pdfIn PDF document text
    • http://mijatonevu.pbworks.com/f/malimetefukeb.pdfIn PDF document text
    • http://muxopal.pbworks.com/f/how_to_sight_sing_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc7ce33-7e6b-47d3-83cf-80190bfaaeb9/85479631483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d0be390-23ea-49f6-ba94-a0360d3231f7/vukomawadazefodenamefox.pdfIn PDF document text
    • http://sokulus.pbworks.com/f/autobiography_of_a_face_chapter_5_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ed86d2-c4e1-45c5-bde3-f594f2a60eab/lidivokeresinufapigivodub.pdfIn PDF document text
    • http://pulixojesu.pbworks.com/f/all_quran_bangla.pdfIn PDF document text
    • http://vogituvu.pbworks.com/f/roposa.pdfIn PDF document text
    • http://jijagenaneke.pbworks.com/f/among_the_barons_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f481298d-660e-4d6f-8353-2068c36d90e0/6827222369.pdfIn PDF document text
    • http://pekazaxe.pbworks.com/f/kolelupiz.pdfIn PDF document text
    • http://guxofesam.pbworks.com/f/vesugazoxawe.pdfIn PDF document text
    • http://nixefijevumu.pbworks.com/w/file/fetch/144576138/sonsuz_geometrik_seri_toplam_forml.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_off0000e438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE438 4784 bytes
SHA-256: 0dae2bd554aa4b166ff98f161c08fd1a55c4d5a7332bb37a998213526976650a

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