Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c079dee14e0900…

MALICIOUS

PDF

71.6 KB Created: 2021-06-01 03:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b1c9d04dd2d2708f508a316fd30a648 SHA-1: 232fcba804c577c5ae503fdef17da51085feff3b SHA-256: b7c079dee14e09004414a0139ef37ba07c765c9aa07f5a268c3ed6ef197916de
104 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL and exhibits characteristics of a phishing lure, as indicated by the 'SE_URGENCY_LURE' heuristic and the ML classifier's high confidence. The ClamAV detection further confirms its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crysiq.ru/pbw?utm_term=guitar+tab+pro
    • https://cdn-cms.f-static.net/uploads/4366622/normal_6020c9285a37e.pdf
    • https://cdn-cms.f-static.net/uploads/4462096/normal_600b0e8f7dc22.pdf
    • https://cdn-cms.f-static.net/uploads/4480876/normal_605511f65aa27.pdf
    • https://cdn-cms.f-static.net/uploads/4473651/normal_60370ce12afe3.pdf
    • https://cdn-cms.f-static.net/uploads/4449205/normal_605aaee544580.pdf
    • https://cdn-cms.f-static.net/uploads/4446285/normal_60325c71933ae.pdf
    • https://cdn-cms.f-static.net/uploads/4378830/normal_604135970646b.pdf
    • https://cdn-cms.f-static.net/uploads/4419637/normal_6069f76cf3a62.pdf
    • https://cdn-cms.f-static.net/uploads/4491432/normal_604004be1ec84.pdf
    • https://cdn-cms.f-static.net/uploads/4419654/normal_6054b6ed4c8a5.pdf
    • https://cdn-cms.f-static.net/uploads/4484805/normal_603f877160aa4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xuruzinijub.pbworks.com/f/marag.pdf
    • https://uploads.strikinglycdn.com/files/c33fdee5-cf2c-48bd-93dc-bbb0ded09a85/14445580552.pdf
    • http://ziduzobif.pbworks.com/f/55767925416.pdf
    • http://degenazi.pbworks.com/w/file/fetch/144433020/how_to_prevent_water_borne_diseases_ppt.pdf
    • http://visetululiv.pbworks.com/w/file/fetch/144415185/solving_compound_and_absolute_value_inequalities.pdf
    • http://veweran.pbworks.com/f/40_60_condominium_winners_list_2020.pdf
    • https://uploads.strikinglycdn.com/files/72db346b-28ba-45db-b1d6-31296cba4523/why_does_my_computer_say_no_operating_system_found.pdf
    • http://godekazonigi.pbworks.com/f/real_estate_license_exam_for_dummies.pdf
    • https://uploads.strikinglycdn.com/files/dd702f2c-9b17-4b52-ad04-60d9f1c6402c/niwojomavipewid.pdf
    • https://uploads.strikinglycdn.com/files/50f25a4b-e0ba-4cd5-acb1-49c652b68d4a/ditch_witch_3700_service_manual.pdf
    • http://kufavuva.pbworks.com/w/file/fetch/144426513/84776467845.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_off0000da89.bin
1fdea5642cf461e77121818659e65c5ab5a1a992d38a9f865d9ed87c96b5dc64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA89 4776 bytes
font_01_sfnt_off0000ead1.bin
501b3ac378b989568b1326cad07ae1fe986ce21be120230e273495d7a0aee83d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 11332 bytes

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