Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf517639473db03…

MALICIOUS

PDF

80.0 KB Created: 2021-03-26 14:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 930a180dddcd9da11a390d63586547de SHA-1: 78d97fa2f926d2edd4bc9a7daa4969a02eba8de5 SHA-256: 3cf517639473db03091a1abeae3dada25933b1f17ecaea89fff7f5a66fda8514
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity, disguised with keywords related to a popular game. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://crophysi.ru/wix?keyword=walking+dead+road+to+survival+cheat+engine
    • http://gajonedorebuko.mywebcommunity.org/sony_wh-1000xm4_vs_sony_wh-1000xm2_reddit.pdf
    • http://jibakerutev.mypressonline.com/sony_trinitron_21_inch_tv_price.pdf
    • https://cdn-cms.f-static.net/uploads/4428341/normal_601d832a2e29b.pdf
    • http://webmastervlad.ru/vsp_employee_enrollment_formo754u.pdf
    • https://cdn-cms.f-static.net/uploads/4489050/normal_6048c7901857a.pdf
    • https://static.s123-cdn-static.com/uploads/4392207/normal_5fccb779c3e7c.pdf
    • http://load-bcp.com/rivotutobawid8r54a.pdf
    • https://cdn-cms.f-static.net/uploads/4405662/normal_6041e5bb93d66.pdf
    • http://dajexori.mypressonline.com/83470977709.pdf
    • https://cdn.sqhk.co/kigowabalo/nhfJbbC/32532577206.pdf
    • http://italysummer.fun/4th_grade_spelling_list53fi6.pdf
    • https://cdn.sqhk.co/tomubozes/iihgiid/rank_of_a_matrix_row.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_fe4ede264af44fbe9263e3753a8b7718.pdf?index=true
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_9a77388770834849b92896d198f55cdb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9a7568d9-2040-40c7-bdf7-74a53558097b/usb_wiring_diagram.pdf
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_0aa6dd00cfed40e08816999302cda41a.pdf?index=true
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_8844430f827b45d1b112ae63882cbda0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9722e3e9-64f0-43d1-a47c-5c7c1881def8/ovid_metamorphoses_summary_book_2.pdf
    • https://uploads.strikinglycdn.com/files/af0646bf-8d54-479a-b232-35a39e79dbe8/xagenufokevemalexareli.pdf
    • http://pimobepetokonud.myartsonline.com/singer_simple_sewing_machine_bobbin_issues.pdf
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_08e28216a300417393e1e8cfd3432eed.pdf?index=true
    • https://uploads.strikinglycdn.com/files/142e72ff-942e-43b2-87d5-46d0cb804c6d/search_by_image_on_chrome_mobile.pdf
    • https://uploads.strikinglycdn.com/files/a03820ab-a2df-443d-96b3-e4e64a44c4c7/myer_briggs_personality_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_off0000fc56.bin
23c05656cbc7c1d2b0ee02b4c76f968c6d579585346175df5d83159b0125bb4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC56 5340 bytes
font_01_sfnt_off00010e89.bin
8eb9bebd6e30a4321e84eaf2c6950f2a90ddeea7d3be4044682aae344c2bc950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E89 10500 bytes

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