Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9256f9b67c54265…

MALICIOUS

PDF

343.0 KB Created: 2021-03-19 10:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8d9c1c7b7b501de955afc19ab2ffdb3c SHA-1: 20c389c649e79a1d4e500445139321f470212e56 SHA-256: d9256f9b67c54265b61208d454c80821838dadb407febf71de4a03902bc0f7a8
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 URI pointing to a URL that appears to be a lure for an award, designed to trick the user into visiting a malicious site. No scripts were extracted, but the presence of external URIs and the nature of the ClamAV detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9618

Heuristics 4

  • 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://jacksth.ru/award?keyword=balogh+mary+pdf PDF link annotation
    • http://keepmaxi.space/lamborghini_gallardo_superleggera_spyder_for_saleuw8bt.pdfIn PDF document text
    • http://mestorating.ru/fivuzizixufilomofezakenyurgc.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/t_critical_value_for_95_confidence_interval.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/93301581458.pdfIn PDF document text
    • https://cdn.sqhk.co/wudarivat/cyjjGnW/j730f_android_9_root.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/fO9h6gf/56980301523.pdfIn PDF document text
    • http://maxefeb.iblogger.org/adobe_to_word_converter_software.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/nokiwidelexemu.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/jcjhhiU/16320557375.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mojofukiw.epizy.com/winrar_update_version.pdfIn PDF document text
    • http://pujexube.epizy.com/deranefoderusoroziv.pdfIn PDF document text
    • http://zanutebuxeboluv.rf.gd/stihl_weed_wacker_hedge_trimmer_attachment.pdfIn PDF document text
    • http://rulufegelaz.rf.gd/zililuludiditovax.pdfIn PDF document text
    • http://muxolisakij.epizy.com/civilization_iv_colonization_strategy_guide.pdfIn PDF document text
    • http://palomidifigur.epizy.com/wasamepos.pdfIn PDF document text
    • http://pabaxekuvo.rf.gd/autodesk_trueview_2017.pdfIn PDF document text
    • http://nidalufexif.epizy.com/zujolawobazoxivibo.pdfIn PDF document text
    • http://mixomexazuvoxod.rf.gd/narodikomuvupegotulo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004e1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1B3 5428 bytes
SHA-256: ed6d427aa22695d548bdb6cb925d233bd7d4e33649e597f5fd2b0fdb4143788c
font_01_sfnt_off0004f400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F400 6184 bytes
SHA-256: 0d66aca82185dabd6b290e213cee375ea0a03ea49d09d5e8add825d2359ca19c
font_02_sfnt_off000504e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x504E9 14148 bytes
SHA-256: f40b6b611dfc73d9e0d2c21cb93f7b91f8feb9e9cae84a048bffbce6d9a226a3
font_03_sfnt_off0005319a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5319A 18188 bytes
SHA-256: 9f059e457f3df22dd9497954075f48371f7209c1dd5e6d3d062947063031fb86

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