Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5272ba25648192b…

MALICIOUS

PDF

71.1 KB Created: 2020-11-25 22:32:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 455c4233681670e86ae1a28f4669ef00 SHA-1: d90ae372e9e159004333830caaec9164909daf90 SHA-256: f5272ba25648192b8118a0361d89a63826f5476dc276203a5e9f46ad6f545ff5
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The embedded URL is likely part of a phishing lure to trick users into downloading malicious content. No scripts were extracted from this sample, but the presence of a suspicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/strik?utm_term=rayuela+pdf+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f9ac4ac77e4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f953d7a79286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_5f9683b9c00de.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/dumupa/80716921929.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/5331849779.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/puvok.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/90195607314.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/77815924125.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/guzisadopaz.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/ielts_academic_reading_practice_tests_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/84681634506.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/dikib.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/hp_beats_audio_software_windows_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/celeste_chapter_2_strawberry.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/nvidia_graphics_card_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/free_fire_alarm_inspection_report_template.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_off0000d788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD788 5316 bytes
SHA-256: 77ee6283a547c0345b6e1cc608999d59493a3a590d19ee8dc0fe270d4c2d1356
font_01_sfnt_off0000e9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C3 11620 bytes
SHA-256: e4fe4974c46e615729527dbea871ce375e263ba01b77b1d7e17602997fe52a87

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