Malicious PDF — malware analysis report

Static analysis result for SHA-256 06003cb204f81d00…

MALICIOUS

PDF

65.3 KB Created: 2021-02-16 12:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 338a9bdbfc62ae69a90d1f8a75651fe5 SHA-1: d01431db1c1f96d1c4a92dd4ed334c9f4f3ca115 SHA-256: 06003cb204f81d003f616b4eaf3f0a9dcd869497b156deeaaaf1a781ea8503cf
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, specifically as Pdf.Phishing.Trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, appears to be a lure related to a textbook solutions manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=modern+mathematical+statistics+with+applications+second+edition+solutions+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501659/normal_6017cd5973484.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/jbjhhjh/fetesi.pdfIn PDF document text
    • http://losinglotterynumbers.com/creepypasta_amino_apkv7usq.pdfIn PDF document text
    • http://it50save.info/afunika_latest_songs_2018f4lyh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485930/normal_6019a1b07385f.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/fiaokgj/fidedugubawalatu.pdfIn PDF document text
    • http://monoga.space/bootstrap_kanban_board_templatebgju0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5fd64d8d5792b.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/HihAJa3/80573023936.pdfIn PDF document text
    • http://help-service-support.com/14196935670k57dp.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/GAgGgj0/breakfast_buffet_items_list.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/vudivuzakal/1731333518.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/what_is_a_revolving_line_of_credit.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/learners_test_questions_and_answers_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/93117574585.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/abnormal_psychology_noun.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/naxejegugorajetaga.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/allu_arjun_film.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/compressed_sheet_mask_watson.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_off0000c254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC254 5412 bytes
SHA-256: a26a434f3383289ad27ddccd5986961df6290ac66339db57795935b7931073b6
font_01_sfnt_off0000d4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A8 10096 bytes
SHA-256: 65598dcee6f8fb4c659dac75fd67aaa8b1a7e758fa2e69d0b56fa54dc6de1a04

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