Malicious PDF — malware analysis report

Static analysis result for SHA-256 411ec3240d462f67…

MALICIOUS

PDF

87.0 KB Created: 2021-03-21 04:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da6de46cb238030c0f088dd833d2d175 SHA-1: 120cb595eb2f960941f82c64598351ef4c7544a4 SHA-256: 411ec3240d462f67d0da5255554e6f941405a2022c66cfef489bb720c2e97d5d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=ib+chemistry+textbook+pdf+2014
    • http://activa-fb.com/isotopes_are_all_atoms_of_an_element_alike6v1co.pdf
    • http://esmoney.site/sisanawobubodagofipomiicjem.pdf
    • https://cdn-cms.f-static.net/uploads/4368493/normal_60526453e001c.pdf
    • http://lnstagramverifiedbadgeshelpcenters.net/92445931981rephf.pdf
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5fdb307c350bb.pdf
    • https://cdn-cms.f-static.net/uploads/4368950/normal_602439751c7e2.pdf
    • http://shoop-fn.ru/red_slug_bug_for_sale4rk24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/biwuwukesazef/47977290732.pdf
    • https://s3.amazonaws.com/zumomasugipeno/what_is_a_socio_economic_status_example.pdf
    • https://uploads.strikinglycdn.com/files/175659ef-7e4c-4c46-8ea1-a48f3aa138b6/rumotenifokubapok.pdf
    • https://uploads.strikinglycdn.com/files/b01695a8-112f-4f4c-a02f-68d65a20d38a/9171217893.pdf
    • https://s3.amazonaws.com/divexikav/learn_how_to_do_currency_trading_in_zerodha.pdf
    • https://s3.amazonaws.com/girilifawuxi/a_week_in_december_sebastian_faulks.pdf
    • https://s3.amazonaws.com/jafujasiwetid/impala_platinum_annual_report_2018.pdf
    • https://s3.amazonaws.com/muvazi/57963785459.pdf
    • https://s3.amazonaws.com/gulapore/72292386820.pdf
    • https://s3.amazonaws.com/xozeb/7028126700.pdf
    • https://s3.amazonaws.com/banula/dysfunctional_uterine_bleeding_management_guidelines.pdf
    • https://s3.amazonaws.com/jozetej/nana_ampadu_all_songs.pdf
    • https://s3.amazonaws.com/xeropizuwe/48351349520.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_off0001112b.bin
fcc2667e6a7bfc55e510c4420aac53339a29dd940b9eccc334ee37377a1ee0a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1112B 5880 bytes
font_01_sfnt_off0001251c.bin
a1b305b771e1b7913bc201a98aeb06a4c3b191350e5eed3e7295c4d430dea07a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1251C 12276 bytes