Malicious PDF — malware analysis report

Static analysis result for SHA-256 c21e638a39aeddc3…

MALICIOUS

PDF

72.1 KB Created: 2020-11-25 14:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f864405bf9ae109734577111e21d9618 SHA-1: bfe92cbddee4a2536b528daf149ccd70fc790e77 SHA-256: c21e638a39aeddc3129fcc245a982bd6556ac9329abc36b2550a84d1aa283c02
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffe.ru/strik?utm_term=manual+do+relogio+casio+world+time+illuminator PDF link annotation
    • 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/fadedosi/lego_games_unblocked_66_batman_cars_games.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/ezgo_rxv_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/nusemavewulifofukejabu.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/anamika_songs_ming.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/the_norton_reader_shorter_14th_edition_online.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/kepoxegilor.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/brother_online_user_guide_mfc-_l2750dw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55c3f69a-372d-4314-a21a-b61041dcc6e5/sweat_play_script.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/infocom_2020_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/clerk_of_works_and_site_inspector_handbook.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_off0000ce67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE67 5240 bytes
SHA-256: 1a45ec4fde3e188025c98a212caade8e7959ce851e52d4ae541706822cbbacb6
font_01_sfnt_off0000e031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 10848 bytes
SHA-256: 5773905045f4163eda30a551f755c80cdb72ee7d2a08122db9f7900c1717dfe9
font_02_sfnt_off00010535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10535 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176