Malicious PDF — malware analysis report

Static analysis result for SHA-256 adabef78b5de67b6…

MALICIOUS

PDF

171.0 KB Created: 2021-01-01 18:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1b283894df3aba4676bafb9bddc0b1ae SHA-1: 758b73c110475161ffc045ea3f77ab420bf53d44 SHA-256: adabef78b5de67b6dbbd0909e12e7859f40929a6502e90164a855a8d69b24a42
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though partially corrupted, suggests a lure related to a school supply list, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://trafffi.ru/123?utm_term=soaring+hawk+elementary+school+supply+list PDF link annotation
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/6391395.pdfIn PDF document text
    • https://telazavax.weebly.com/uploads/1/3/4/7/134729689/joxobatu-mupomozol-xakipojotu-rupobomoronux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5fad3124a1af8.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/meraxemegoreze_jogadogu_jaxur_wopopubepad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421051/normal_5fb7214f68511.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/panalipolifod/chapters_interactive_stories_unlimited_diamonds_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdefdcbe-3cee-4126-8bb9-dcb6ab0739ee/bioquimica_harvey_6ta_edicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1241afb8-40fa-400a-8a95-6527891f3d19/hose_end_sprayer_not_siphoning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eeb5192-2378-4ede-a3ea-a8ee9e503716/panibugokus.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/riddle_school_games_online.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/rizonus.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/ar_verbs_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/nakefaxitemo.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/11682826724.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25760 5588 bytes
SHA-256: 5ceb768b7f51ffe1ca9e70b2bf12a081b8711c937ef8a1d73d229f2d49f4bf73
font_01_sfnt_off00026a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26A4B 11100 bytes
SHA-256: e93cc92854159c36176065ff154e8b8509bd9b215d5dd1c9a417ff9991ff656a
font_02_sfnt_off00028f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28F7D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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