Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8df906bc3ac6901…

MALICIOUS

PDF

73.5 KB Created: 2021-06-08 07:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d6cbc0be579362985438e74dd5110802 SHA-1: 61bfb38442fc061b3dd62edd11e4e775fe14f596 SHA-256: b8df906bc3ac69019d722ab44435821eb69e460258fbcf9b77cf103e0bab6007
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 0.8534

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://pistant.ru/pbw?utm_term=how+to+become+a+certified+scentsy+consultant PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464702/normal_5feddf9947e0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485005/normal_605612d27ab98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_6041cb76afeef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_60ba4b737094c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_6066f295149e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475376/normal_600a0765c95fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403127/normal_6055e23b235af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416802/normal_6005a1504c414.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cd4937-38c2-4e58-a527-58d0e0afcb27/lujosavoxerekawoxejite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/019c07ee-82ab-42bc-b71d-36a5f9e2434f/when_should_we_recite_surah_waqiah.pdfIn PDF document text
    • http://mavujeridolu.pbworks.com/w/file/fetch/144501291/top_100_drugs_online.pdfIn PDF document text
    • http://wenitudodub.pbworks.com/f/mabebetalepapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b130b2a-6141-4790-a875-3651aacd7e69/wolapex.pdfIn PDF document text
    • http://zipiwume.pbworks.com/w/file/fetch/144820560/you_dont_know_javascript_async_and_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e236313-7923-4a91-bed3-122406c60b49/what_does_maiden_voyage_mean_dictionary.pdfIn PDF document text
    • http://nekimijazom.pbworks.com/w/file/fetch/144669771/sizekururimapa.pdfIn PDF document text
    • http://kivotin.pbworks.com/f/is_tlauncher_illegal_in_canada.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/w/file/fetch/144562188/3971921103.pdfIn PDF document text
    • http://barumena.pbworks.com/f/jlpt_n4_kanji_practice_sheets.pdfIn PDF document text
    • http://motekus.pbworks.com/f/como_descargar_adobe_audition_1.5_gratis_en_espaol.pdfIn PDF document text
    • http://kalunagepigi.pbworks.com/f/barani.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418614/what_are_the_best_types_of_coffee_beans.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_off0000f109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF109 5460 bytes
SHA-256: f5d16768c4dc80f7a7e55716aa3ee3c57fb698fd51a85d6f90c6e02696cebf39
font_01_sfnt_off00010398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10398 11476 bytes
SHA-256: a3fd58c1316516e33ab281fc64cb0a03847061d59e877cae10f5059088e0bf15

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