Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d93642c4f143e2…

MALICIOUS

PDF

74.8 KB Created: 2021-02-27 19:36:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cdb522dd9849a6bacae8076564239bbb SHA-1: e892afa5c5fe4d7607ec1ceb3f6e244175eaa653 SHA-256: 38d93642c4f143e29a98dad2232350951fa21f15d5e3e06e239852ea9b5febbb
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though heavily obfuscated, suggests a lure related to accounting class material.

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://gimoguvi.ru/123?utm_term=journal+entries+accounting+class+11 PDF link annotation
    • http://nekretnine.site/pizizidusokefujuxefiiyxht.pdfIn PDF document text
    • http://alsamcctv.com/merchant_marine_definition_websterswmwc.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/hjbWMjj/wokevuzaxosuluz.pdfIn PDF document text
    • https://cdn.sqhk.co/mesojofu/1gc1ku4/siren_head_parkour_free_running_classes_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500186/normal_5fcd94dad26d9.pdfIn PDF document text
    • http://itsamorem.com/sodemeworosowogeselx4ft6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393485/normal_601bdf83e5b96.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/8178955.pdfIn PDF document text
    • https://sadavofabuloxus.weebly.com/uploads/1/3/5/3/135316226/xiluribuzugujo.pdfIn PDF document text
    • http://best-ital.fun/puburimepuxuxegavunodpg87m.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/haViiih/32047892417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_5fd651e38f6a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450156/normal_6008deb496b43.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/OAhbhc6/download_motogp_racing_2018_mod_apk.pdfIn PDF document text
    • http://tovelksa.website/tibazexasavf666.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/MiicSDi/bavarian_knife_sharpener_walmart.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/savukojubusum/music_theory_worksheets_for_band.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/ecology_practice_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/catapult_king_mod_apk_unlimited.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/98610282791.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_off0000e87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87A 5008 bytes
SHA-256: 6cd11dc1ca73bf7ffadc1990ae6cbbaf2b28566316055cdef4969a27aa5e6631
font_01_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 10724 bytes
SHA-256: 88ed3d9652be917bc31921a91fd39721fb58d7273882abaf6d9c4c5a34b9bc0d

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