Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4317ba9a99e1fe…

MALICIOUS

PDF

73.8 KB Created: 2021-03-12 07:10:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 600da2c62b85a79b49c555a4f14ffc1a SHA-1: 9a0b8eb43f6edf7d78d927a96ca1e66dcebb9a00 SHA-256: de4317ba9a99e1fec9175c5a4f9e2bf43046b8c5af5dfe8e6fc499de26ae7401
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific ClamAV detection name indicating it's a phishing trojan. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing lure, commonly associated with spearphishing attachments.

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://vilenefex.ru/award?keyword=deductive+reasoning+in+mathematics+pdf
    • http://fukazab.mywebcommunity.org/pulgadas_milimetros_tabla_conversion.pdf
    • http://blaugrana.ru/kuwosiluzigomidusotow3cssm.pdf
    • https://static.s123-cdn-static.com/uploads/4494433/normal_6005c26ff280a.pdf
    • http://forkidsshop.online/water_bottle_label_template_psdw1fwk.pdf
    • http://bumasujofoj.getenjoyment.net/kukogenojekopid.pdf
    • http://fikapopupalake.iblogger.org/blockbuster_video_song_mp4.pdf
    • http://vodabutopidaru.getenjoyment.net/heat_exchanger_calculations_shell_and_tube.pdf
    • https://cdn-cms.f-static.net/uploads/4404966/normal_6019ae01084f1.pdf
    • http://keto-menu.online/manufacturing_balance_sheetgszcg.pdf
    • http://nudistoff.club/503022170765h5oa.pdf
    • http://kejoxemubogese.mywebcommunity.org/notas_de_canciones_cristianas_en_teclado.pdf
    • http://silujokiz.mypressonline.com/68816697634.pdf
    • http://xidasetetobuge.scienceontheweb.net/the_basic_practice_of_statistics_6th_edition_download.pdf
    • http://mixixokixa.22web.org/grade_2_math.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f0d2461e-d6ab-4cfd-b0d5-7c82b23f50c6/how_to_find_out_cylinder_volume.pdf
    • https://uploads.strikinglycdn.com/files/3c0bccf5-1551-468d-acc0-f040a2be206e/can_u_die_from_overeating.pdf
    • http://dowuvoduwitovos.atwebpages.com/dekes.pdf
    • https://uploads.strikinglycdn.com/files/729d7222-a9bc-4b1f-bba6-b532398cded7/sailing_made_easy_asa_101.pdf
    • https://uploads.strikinglycdn.com/files/2b0d0dd0-833d-4ee4-b28b-793fd1821b15/add_2nd_edition_spells.pdf
    • http://tomabev.rf.gd/ielts_reading_general_test.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_off0000e292.bin
34a09cc58f3a623026081a4cb64d9878843658c7cc29f911a75b3326328f0575
pdf-font-stream PDF embedded font (sfnt) at offset 0xE292 5596 bytes
font_01_sfnt_off0000f580.bin
ded10469fd983f5a170842871e31aa327c11155e107e1c1f143c3ed2aedb96cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF580 10668 bytes