Malicious PDF — malware analysis report

Static analysis result for SHA-256 c840902a8545b967…

MALICIOUS

PDF

71.6 KB Created: 2021-03-08 18:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 866e3ad35151094f77dc13ba3a313e21 SHA-1: 5c5d23b0b25d0a0c4492d63f098f1f4aafefc860 SHA-256: c840902a8545b967820b461b97743468133893a8441cfb660c2d917528f34905
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/award?keyword=small+pdf+split PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426941/normal_6002056f94087.pdfIn PDF document text
    • http://bakuvuwojesefa.iblogger.org/pacman_game_free_offline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_602a057573c56.pdfIn PDF document text
    • http://weex.info/1389796806mu5o7.pdfIn PDF document text
    • http://tublitalia.fun/lefuvopapugokexojibus6w85.pdfIn PDF document text
    • http://blockingscenery.com/buwebovilopoguzjpd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493221/normal_602aa680110a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_60256968888c7.pdfIn PDF document text
    • http://julubavixukab.66ghz.com/87904460185.pdfIn PDF document text
    • http://alisabor.design/gulisagovewurlt3yy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_60207e52a95a5.pdfIn PDF document text
    • http://sayseedokg.com/best_amp_for_mtx_terminator_subscymm6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d037b5-4a87-4b07-94a5-cb469acbbd49/why_wont_my_acer_computer_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c440b2c4-88a4-4a9a-9a39-19b0edc12369/jomofexabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2134fa0d-2ffa-4464-a9f7-e07b33426adf/sapirituvunipikanivifud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25a1388-cb20-4e13-b1b2-9f8ef8659ed0/56359713573.pdfIn PDF document text
    • http://tekarileted.epizy.com/65973004518.pdfIn PDF document text
    • http://zawagifuwumi.rf.gd/edward_said_orientalism_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea148d24-45f4-4465-9a01-a6abbf5761c3/expanded_noun_phrases_homework_year_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c4954a7-b8d9-4d4a-bd16-6c5f1388d6e7/motorola_minitor_v_amplified_charger_accessories.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_off0000d63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63C 5192 bytes
SHA-256: 0d419924ea6168822a16b763479a537897e68f433a0f4a0577fd099faf6f0909
font_01_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 13660 bytes
SHA-256: b375afdd8e3a5be5a98f98b917215c12ccf9b1ed63bab3304dd0be8ecfe394e3

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