Malicious PDF — malware analysis report

Static analysis result for SHA-256 993dcb9c0ddd857d…

MALICIOUS

PDF

78.8 KB Created: 2021-03-23 02:03:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0db7461d14be9094e6f629611076904d SHA-1: d1aad8c65d085116756fbba0bc17aba896a98cff SHA-256: 993dcb9c0ddd857d2376ecff494851dbd0cc57a355d867b25983c00ed63be7c8
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, one of which is presented as a 'training module', suggesting a phishing or social engineering lure. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, pointing to external resource access.

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://leonvi.ru/award?keyword=achievement+motivation+training+module+pdf
    • http://drilltech.info/terraria_save_gameq8lnr.pdf
    • http://deutschebank-meine.com/romeo_and_juliet_2013_hd_movie_downloady8etz.pdf
    • https://cdn.sqhk.co/zogobadakedu/d0I6jdw/gear_club_true_racing_mod_apk_rexdl.pdf
    • http://immorta-cross1.club/235233729589r21j.pdf
    • https://cdn.sqhk.co/woteruzid/irwXgef/vajujewinupaza.pdf
    • https://cdn.sqhk.co/bewewojiwo/atQiiii/line_color_3d_app.pdf
    • http://romeital.space/mcgraw_hill_ryerson_answersn03tr.pdf
    • http://piredvizhnik.com/the_maze_runner_book_summary_shortpsn2r.pdf
    • http://abanca-electronica.com/330995131552jjkp.pdf
    • https://static.s123-cdn-static.com/uploads/4418175/normal_5fe47e14efa6a.pdf
    • https://cdn.sqhk.co/zetoxezoza/diegg2g/91270556559.pdf
    • https://cdn.sqhk.co/xonarewu/gdAwOhi/10517806713.pdf
    • http://nowtorrentz.com/petsafe_wireless_fence_pet_containment_system6no8y.pdf
    • https://cdn-cms.f-static.net/uploads/4387712/normal_6056d95f0a2a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tolitaxolumupu.rf.gd/wivukobutitabifufijisijaj.pdf
    • http://vepobivadiwinar.epizy.com/xizekeketufageg.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f566.bin
acbaeda731dea81ec406f9257fa144762d0f41eaa3c400b733d0674ab1e90100		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF566 5440 bytes
font_01_sfnt_off000107c7.bin
6b8c9954b6785360a34178cf3cf14ff40faab19a18989cd9ccd9e1b0d788e4d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107C7 10584 bytes

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