Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f893dda41f46c48…

MALICIOUS

PDF

76.6 KB Created: 2021-02-27 18:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 718c88f64e78015ff9f02c45e247c845 SHA-1: 4ac65cd68db562f293b16f37bbdbd633035ec6e6 SHA-256: 1f893dda41f46c484d3bddab2c9681f70df20aec39c0ed0e7f8f74a6e409e3ee
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'ponafet.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to a book sale, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=theory+of+moral+sentiments+book+for+sale
    • https://cdn.sqhk.co/gimenuxot/jjQhbrr/bawolemulapiwijowosi.pdf
    • https://static.s123-cdn-static.com/uploads/4463792/normal_6000194a8421a.pdf
    • http://front-glass.space/nuwavegonefoxowuwemijlgxyd.pdf
    • http://lobabinuladeri.medianewsonline.com/estudios_biblicos_cristianos_en_espanol.pdf
    • http://wewogokuwidu.mywebcommunity.org/kedidefuxalupeba.pdf
    • https://mizevazorabij.weebly.com/uploads/1/3/5/3/135347525/6257695.pdf
    • http://setokanekema.mygamesonline.org/69670655996.pdf
    • https://static.s123-cdn-static.com/uploads/4370076/normal_5ff45178abbfe.pdf
    • https://govalusazun.weebly.com/uploads/1/3/5/3/135325024/cc92f5cfefba.pdf
    • http://megesodore.iblogger.org/16180052591.pdf
    • http://reduslim-sito.site/free_video_call_recorder_for_whatsapp3g3s9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://padenijuwike.rf.gd/ashab_e_kahf_episode_12.pdf
    • http://lavemob.epizy.com/30013379951.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee41.bin
764775c8bee0698b0bb39fcea684e9c82a3fbf69a392094e0f49e695d073cafc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 5264 bytes
font_01_sfnt_off00010002.bin
a6266a28c5f680472ed5a4778ab7cfb0c0779431a9c84feb7aa389caff295f20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10002 10372 bytes

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