Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f50e3787a79bd4…

MALICIOUS

PDF

77.1 KB Created: 2020-11-23 08:37:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 222fedaebc5423784255f4c68413c5ee SHA-1: e7226df0c28ffe292d6314d7fb4e634cb11a69f7 SHA-256: a3f50e3787a79bd4b702e5e0c6729cb750976b673b5e53bc5cec80f5b2ad563d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'traffset.ru', which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing lure designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=chronosync+for+windows PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/bible_story_for_kid.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/gospel_songs_lyrics_and_guitar_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/panasonic_tv_remote_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/impossible_quiz_answers_question_40.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d87995-6add-4807-905a-c0286d60206b/bench_press_manual_by_louie_simmons.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/palisesifupevizuko.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/vufagalu.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/liveg.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/dominant_religion_in_georgia_country.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/tuwobovalerefomibidav.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/90060616948.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/guzebetim.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/five_nights_at_freddys_3_unblocked_66.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/begegifijejukesigixile.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_off0000eebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 4964 bytes
SHA-256: 45f9ba6dc34ce45ad23e0b18b2035958ec7da6725fef7f8e620a9ec498d3a502
font_01_sfnt_off0000ffb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB2 11764 bytes
SHA-256: 0719eead04b9cb8d8d772484b4796f92f6bc156c31fd13c0201c0a1da5a0ece3