Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f2de2f349283a1…

MALICIOUS

PDF

77.7 KB Created: 2021-04-10 14:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5846d47b90715f28029ca65bd947bfaf SHA-1: dd103e202f81a6ac432126c71369114df2ce1578 SHA-256: 36f2de2f349283a1ac146dbc80d7fac55a21a80ca8129727ec78c17ae465d74f
96 Risk Score

Malware Insights

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

The file is a PDF that contains a malicious URL, identified by both heuristics and ClamAV detection. The ML classifier also strongly flagged it as malicious. The embedded URL, https://botokaw.ru/strik?utm_term=best+manga+drawing+books+reddit, is the primary indicator of malicious intent, likely leading to a phishing page or a malware download. No scripts were extracted, but the PDF structure itself facilitated the malicious URL delivery.

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://botokaw.ru/strik?utm_term=best+manga+drawing+books+reddit
    • https://cdn.sqhk.co/lizuloka/CjgvNhf/virtual_pet_buddy_2.pdf
    • https://cdn-cms.f-static.net/uploads/4481516/normal_6027cf2a6577b.pdf
    • https://cdn-cms.f-static.net/uploads/4413867/normal_60435a5c337f1.pdf
    • https://cdn-cms.f-static.net/uploads/4491432/normal_603c4e761529e.pdf
    • http://lokuvowegibo.iblogger.org/cartina_cagliari.pdf
    • https://cdn-cms.f-static.net/uploads/4486060/normal_60497db38eb2a.pdf
    • https://static.s123-cdn-static.com/uploads/4490534/normal_5fc60f3cebedf.pdf
    • https://cdn.sqhk.co/zegetaru/jiYgihd/57000135639.pdf
    • https://cdn.sqhk.co/xorazasuno/g4ihO31/wubanubamipisawin.pdf
    • https://cdn.sqhk.co/fefamuve/jO5hejj/ludo_star_classic_apk.pdf
    • https://cdn.sqhk.co/jesotipo/icithi0/skylanders_trap_team_villains_wiki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vixuwogetiv/algebra_worksheets_grade_6.pdf
    • http://valamujunitun.epizy.com/6849464374.pdf
    • https://s3.amazonaws.com/gogonof/information_about_pakistan_flag_in_english.pdf
    • https://uploads.strikinglycdn.com/files/ba271bb9-9b3b-41a3-8c84-9a7d5bdcd916/rukipu.pdf
    • https://s3.amazonaws.com/wemofodi/artisteer_with_keygen.pdf
    • https://uploads.strikinglycdn.com/files/ddbd4bcc-e7ac-462d-91a4-42ecd3483759/install_fallout_4_script_extender_mod_organizer_2.pdf
    • https://uploads.strikinglycdn.com/files/e67cff9f-477a-4bce-ae8f-af594b30e2ba/41992217834.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_off0000f437.bin
cdf6ff0d66642aa0725440a368122b42ad8361e36333509716459eee2ab48d72
pdf-font-stream PDF embedded font (sfnt) at offset 0xF437 5456 bytes
font_01_sfnt_off000106c2.bin
a6395ff98b73a64ac2c87123103abbd24522b2f976d18b71cb4cd4be29e3a1c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x106C2 10376 bytes