Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f4a27da2fcf5ad…

MALICIOUS

PDF

91.3 KB Created: 2021-02-27 15:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 95f02afbb53ea2020b76cb9a2768539c SHA-1: 8bdf5380e6f64a4f3186e75f7a886910c868f0dd SHA-256: 59f4a27da2fcf5adfc8c8eb356fe223a47b76d4cfa94dc92845e615bb99c5b8f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://zajinet.ru/strik?utm_term=ars+notoria+pdf+fran%25C3%25A7ais PDF link annotation
    • http://desokore.medianewsonline.com/puraguna.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/2254966542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403938/normal_5fcfe8f80e822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501214/normal_601bad32a5fd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369764/normal_5fe036f32e8bd.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/the_little_prince_audiobook_mp3_free_download.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/zujujurokexixa.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/what_is_chirp_baofeng.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/9550812407.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/M424Gji/24526720643.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/explain_the_purpose_of_writing_a_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388813/normal_5fe48155c76f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_602aaaf8d5e6d.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/whgj37W/tuzawixezakevumaxuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sorogamat/kewuvofamowenafep.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/king_kutter_finish_mower_blades.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/12931291251.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/the_power_of_prayer_book.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 4844 bytes
SHA-256: 9904aab4ad50c81b8c9fcebbf7dfa6139b457472ee96322010b776f3e51d6c7a
font_01_sfnt_off00011a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7F 19580 bytes
SHA-256: d15001816dfc7ed86a011d4c61a53fe36c961922024375117b58c1799b0c7675
font_02_sfnt_off00015014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15014 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.