Malicious PDF — malware analysis report

Static analysis result for SHA-256 453d07690ebe667a…

MALICIOUS

PDF

80.5 KB Created: 2021-01-21 07:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2da25200cc114678add7c847facc44e4 SHA-1: 1d91653dbe74f762d6ed64081015486fb6360094 SHA-256: 453d07690ebe667ab01d61fb271c2c3dce24a1d9cd1bf6896934e6b8ebede095
124 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses invoice and callback lures, suggesting a phishing attempt. An external URI pointing to 'leonvi.ru' is present, likely serving as a malicious link to further compromise the user. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://leonvi.ru/123?utm_term=jcpenney+closing+list+nj PDF link annotation
    • https://site-1227540.mozfiles.com/files/1227540/fifarevafiginuxototak.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/je46hbj/sudevotibitawofa.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/9UJibhj/influencer_meaning_synonym.pdfIn PDF document text
    • https://site-1175354.mozfiles.com/files/1175354/pijuzojagezife.pdfIn PDF document text
    • https://site-1175316.mozfiles.com/files/1175316/52582099652.pdfIn PDF document text
    • https://site-1167941.mozfiles.com/files/1167941/acrobat_reader_linux.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/jbT1ig8/who_is_stanley_in_it_chapter_2.pdfIn PDF document text
    • https://site-1256533.mozfiles.com/files/1256533/lokofopivinusop.pdfIn PDF document text
    • https://site-1174988.mozfiles.com/files/1174988/update_phones_custom_configuration.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/jobavo/arrowtown_golf_course_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/video_editing_app_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/akele_hum_akele_video.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/wedimexefez.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/41755731368.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/archon_android_emulator_system_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/1660637550.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_off0000fddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDD 4960 bytes
SHA-256: 41b3dedbf02c5d0160bf5ed28b1e1b78557148c5230cdb2f2ad57e7582729dfd
font_01_sfnt_off00010eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEA 11432 bytes
SHA-256: b4fff27a6c1083d05373708f0710601ad8bd008d99dfecac5cf19ca002752fdc

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