Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c4c9049ca87907…

MALICIOUS

PDF

91.1 KB Created: 2021-03-29 04:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8456e02df95c2ca930c360aa407885a SHA-1: 5dbcd6607fd86ed2a88485fa92c6459e6df5ba8d SHA-256: 88c4c9049ca87907dfa7ea0ce8f2595dac49b24bb003af39b465d1322073ed04
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, forming a link farm, and directs users to suspicious domains. The embedded content, though obfuscated, suggests an intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=lifetime+fitness+florham+park+spa
    • https://tinulesuse.weebly.com/uploads/1/3/4/6/134689832/judaralap-dozafotikesijag-kizujamubaxirew.pdf
    • https://cdn-cms.f-static.net/uploads/4416932/normal_60105bc766463.pdf
    • https://savapavazatu.weebly.com/uploads/1/3/4/6/134677348/724d42cd91c4c.pdf
    • http://sojofas.iblogger.org/81474545206.pdf
    • https://gitutibilaralib.weebly.com/uploads/1/3/1/3/131384503/xesovuji.pdf
    • https://wetenonuvodipu.weebly.com/uploads/1/3/5/3/135321676/f1bb5ec5.pdf
    • https://dibuponabax.weebly.com/uploads/1/3/4/3/134340508/9855547.pdf
    • https://nawixelufa.weebly.com/uploads/1/3/5/3/135317770/5350703.pdf
    • https://static.s123-cdn-static.com/uploads/4500893/normal_5fdf217f9e1ab.pdf
    • https://dovekawelefirim.weebly.com/uploads/1/3/4/2/134266448/1477596.pdf
    • http://sumovenelexefik.iblogger.org/95505246883.pdf
    • https://cdn-cms.f-static.net/uploads/4500668/normal_60556c84483b1.pdf
    • https://cdn-cms.f-static.net/uploads/4458412/normal_6025b05308a9a.pdf
    • https://girakojazesu.weebly.com/uploads/1/3/4/6/134675992/bubas-legojomosebix.pdf
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/376b8.pdf
    • http://pirunumilusarib.sportsontheweb.net/99402150107.pdf
    • https://cdn-cms.f-static.net/uploads/4449769/normal_60536a79dcc84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_b50c273b1ffd4cbc9161f86e4ac9cac1.pdf?index=true
    • http://titugol.atwebpages.com/ketogenic_diet_book_download.pdf
    • http://suremamivag.epizy.com/42310414120.pdf
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_ae67531f5e8f4ff59d085cc5901d0bb6.pdf?index=true
    • 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_off0001115f.bin
f134b68d88c79e4296c4e8c832d53a336454c01cbec0bf2ddb9ae384b8ea55f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1115F 5144 bytes
font_01_sfnt_off000122bb.bin
75432ce020b949d1704b93ada812e50a1b3394d7be9a21cc9dcbd7c5440c7100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122BB 11304 bytes
font_02_sfnt_off00014940.bin
c16373bf6dfbd7b9783ea8ea101a02cec618568b734ea643a6ef0820380ba589		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14940 16176 bytes

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