Malicious PDF — malware analysis report

Static analysis result for SHA-256 39797971403cc493…

MALICIOUS

PDF

81.8 KB Created: 2021-02-16 08:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 774145e7468a9ad88dcee0f146068505 SHA-1: a344c4c85c4166b5d6cceb4600edadd7a6090d7d SHA-256: 39797971403cc493b32cf1cd12fc078afb1fa45d2e9eb921306f48d3053462ed
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/strik?utm_term=nikon+coolpix+p520+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384039/normal_5fd2510cd38b9.pdfIn PDF document text
    • http://dukafufuxona.iblogger.org/cable_lateral_raise_proper_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/marriage_certificate_format_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/gotunegarafamapobuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/38246264039.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/vmware_workstation_mac_os_x.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/matematica_discreta_edward_scheinerman.pdfIn PDF document text
    • http://pumajamidu.rf.gd/luxajeb.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/battery_low_notification_tone.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/pexisogiverejadituno.pdfIn PDF document text
    • http://lasuwutiganije.rf.gd/esmo_guidelines_lung_cancer_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/alumasc_heritage.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/judolituje.pdfIn PDF document text
    • http://vituzitozitu.epizy.com/59328722213.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/assam_kokrajhar_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/silezenadaveromabevusa.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_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 5216 bytes
SHA-256: 5d43316da109957defd1646401c971db919e3bf548e13ecdd9726eb739383810
font_01_sfnt_off00011511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11511 10960 bytes
SHA-256: 11134758204ecec9f776c11804ec4dcc5ec4434e326a1f57510324b1914dc6fa

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