Malicious PDF — malware analysis report

Static analysis result for SHA-256 c726dea7b4bcdf72…

MALICIOUS

PDF

68.4 KB Created: 2021-03-01 01:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 648181870c524d0ec2668415e86b9886 SHA-1: ab710ecb23b8a4fac891e1c444785129ef85487d SHA-256: c726dea7b4bcdf72584ddce1ba69c2e23efdbe42d6a4beec3fe1fc4e758ef4c3
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, suggesting it functions as a link farm to direct users to potentially malicious websites. The presence of these links and the overall detection profile strongly indicate a phishing or malware distribution attempt.

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://pelibifir.ru/wix?keyword=honeywell+th4110d1007+pro+4000+digital+5%252F2+programmable+thermostat+manual PDF link annotation
    • http://wejuzofibab.medianewsonline.com/what_is_the_law_of_probability_in_biology.pdfIn PDF document text
    • https://xutafutixon.weebly.com/uploads/1/3/4/5/134576274/rexet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5ff7beaa00ed9.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/mobomap_kaxiboded_vipozemuxibov_zajemalix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447464/normal_5fee6797b0e44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425727/normal_5fd9a429f0d32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402507/normal_6002950add093.pdfIn PDF document text
    • https://zasetumodoroba.weebly.com/uploads/1/3/4/6/134692621/2053e.pdfIn PDF document text
    • https://mawebexakonu.weebly.com/uploads/1/3/4/3/134390129/82129.pdfIn PDF document text
    • https://xewurilarigifu.weebly.com/uploads/1/3/4/2/134236076/mudawo-wabotowize.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408593/normal_5ff47f7bee8c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455884/normal_601317cb0444d.pdfIn PDF document text
    • https://varepanuror.weebly.com/uploads/1/3/5/3/135394497/tajarajusa_zazirozen_fixevevirazo_debiwubobukemo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466398/normal_60058eb071ba3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nivuzujanux.myartsonline.com/vampire_diaries_characters.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/57771828196.pdfIn PDF document text
    • http://jujobope.atwebpages.com/47789754597.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_off0000ca37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA37 6320 bytes
SHA-256: 6323be6b60f674a302f8e32283d054c402374c2bfd096203e63c81f887d051fd
font_01_sfnt_off0000dfbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBE 10396 bytes
SHA-256: 49c38d583757890387d51cbc922e2b12694e1be5171b79c4748101d88a878e0c

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