Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a979444fb612a9…

MALICIOUS

PDF

85.6 KB Created: 2021-05-20 21:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d9d1a950bcfc08f486ff8177f351658 SHA-1: e8418001d241f480f7459f5dfcf9485aeea33220 SHA-256: d5a979444fb612a9f508c21391335a32982b1b0fb70df856ff962aa1131081e1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious content, likely designed to redirect users to malicious sites for credential harvesting or further malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=harbor+breeze+remote+control+reprogram
    • https://cdn-cms.f-static.net/uploads/4406820/normal_6052690398274.pdf
    • https://labupapem.weebly.com/uploads/1/3/1/4/131406977/misenilofetukovum.pdf
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/aee4c293d3aec.pdf
    • https://ritajixudigozik.weebly.com/uploads/1/3/5/3/135345652/2568843.pdf
    • https://cdn-cms.f-static.net/uploads/4479925/normal_60289c177ff16.pdf
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/relagapez.pdf
    • https://tulidakavixesa.weebly.com/uploads/1/3/5/3/135347336/sinovanoj_vediwuvas_radozenisu_wawon.pdf
    • https://gumomerad.weebly.com/uploads/1/3/1/8/131856086/levosagegojozu_fuxixageve.pdf
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/sonojisifep-refoponu-dozilatasadasat.pdf
    • https://cdn-cms.f-static.net/uploads/4492901/normal_600b4bbad0bee.pdf
    • https://lusefova.weebly.com/uploads/1/3/4/5/134583673/butejelasu.pdf
    • https://peliwotamo.weebly.com/uploads/1/3/5/3/135325711/rabegakurufum.pdf
    • https://nozoxajomakod.weebly.com/uploads/1/3/5/3/135332829/752530.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/755e4d6a-0439-4c24-9831-f30b72e70dcd/dr_heideggers_experiment_summary.pdf
    • https://uploads.strikinglycdn.com/files/0aef65f8-4186-45d3-81a6-e1c8528ca9cd/does_god_forgive_everyone_for_their_sins.pdf
    • https://s3.amazonaws.com/vapite/mapijurivusob.pdf
    • https://s3.amazonaws.com/nitirew/ubisoft_tom_clancys_rainbow_six_vegas_2_ps3.pdf
    • https://uploads.strikinglycdn.com/files/058ed472-a41e-4cf2-a1d6-f9d656833fe0/88060572412.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c2.bin
bcb506bd01ff91086bfb40a2f12c7817d19dcbc4d2b339efdd5df96258d3ae18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C2 5224 bytes
font_01_sfnt_off00010b7d.bin
4f0ce0693b133bd175757afd4a6bf12084a2ed84ea6a979408917ff83474831f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 11260 bytes
font_02_sfnt_off00013229.bin
f8d6821e66381006ee6700b237155317197ec7080849f0a33815b5445c388c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13229 16704 bytes

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