Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcc55b95a6398b2…

MALICIOUS

PDF

71.3 KB Created: 2021-02-24 15:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4fca647535e23435618d4dc1f1e2198f SHA-1: 38e1de9a46606e4d6d271837c7a02b6c94e3c8e1 SHA-256: fbcc55b95a6398b2f6726c0c7ed95d32287cc6cb316720d100e1850d83658918
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to disposable domains and identified as part of a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=que+hace+un+agente+de+ventas+turismo PDF link annotation
    • http://okrasote.info/93877424014hm3lg.pdfIn PDF document text
    • http://moitender.org/funugumawakorombz9k.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/gjigNMD/75234281466.pdfIn PDF document text
    • https://ravixibede.weebly.com/uploads/1/3/4/5/134584659/07e3d8c8a19.pdfIn PDF document text
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/jupizomonu.pdfIn PDF document text
    • http://onlinetyz.xyz/ayo_and_teo_dance_videos_hdvidzm9926.pdfIn PDF document text
    • http://indohealth365.online/dolukebivifejejavemabo0r1d5.pdfIn PDF document text
    • http://copyright-central-media.com/ludugusixitabalatinh41z2.pdfIn PDF document text
    • http://qupieasy.online/37735740960808lw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fed2dd364064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_602256ae672c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448124/normal_5fcf40e555d3f.pdfIn PDF document text
    • http://mail-autoscout24.net/1201437095wqoci.pdfIn PDF document text
    • https://cdn.sqhk.co/makulowujip/hjgpiii/gradius_ii_snes_rom.pdfIn PDF document text
    • http://keto-s1.com/basic_mechanical_engineering_conceptsl0ky6.pdfIn PDF document text
    • http://jumbochecker.com/23964755341rp86c.pdfIn PDF document text
    • http://jogegeve.22web.org/merced_school_employees_federal_credit_union_wire_routing_number.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligifufeg.rf.gd/pre-_employment_medical_check_up_form.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD905 5440 bytes
SHA-256: 35248babe5d2df2dc0dc6e16e3b7a78005e9d5a886df55df910d7e15340a0b38
font_01_sfnt_off0000eb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 10808 bytes
SHA-256: 94df8a693b1aebf5d854e755c3844e9feaf884f377ad3637dcbf35d931de1779

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