Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39710bc3e70b557…

MALICIOUS

PDF

129.0 KB Created: 2021-04-11 02:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f18e0e7e66b7588335d22815bf8d9c8 SHA-1: 5108c25170bed298ab79102449246f3f589095e9 SHA-256: f39710bc3e70b557339e5962886f74cce3f21576f7d7e3a9545e0318d0b6b607
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://maypoin.ru/strik?utm_term=knights+of+columbus+supplies+canada', which is likely a phishing or malware distribution URL. The document body is heavily obfuscated, but the presence of the external URI and the overall malicious verdict strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://maypoin.ru/strik?utm_term=knights+of+columbus+supplies+canada
    • https://cdn.sqhk.co/repudodo/ugeyje7/5864149036.pdf
    • http://toportt.online/sozupitemirarepk9mf3.pdf
    • https://cdn.sqhk.co/vuwibagula/Zkeocgg/ncert_books_and_solutions_app_for_pc_offline.pdf
    • http://bigno.space/martin_luther_king_jr_dream_speech_text48l3c.pdf
    • https://cdn.sqhk.co/tosilura/igdehdn/menivuviralafujap.pdf
    • https://cdn.sqhk.co/vitozogog/39mM8Fp/87112358010.pdf
    • https://cdn-cms.f-static.net/uploads/4406771/normal_60503ffee1f17.pdf
    • https://static.s123-cdn-static.com/uploads/4422134/normal_6008a3b2cb075.pdf
    • https://cdn.sqhk.co/bamebuxi/jGZHedV/congruent_triangles_worksheet_2_answer_key.pdf
    • https://cdn.sqhk.co/kagelemovo/9ChaijF/angry_birds_friends_facebook_cheats.pdf
    • http://detonic-de.website/tmnt_portal_power_apkpurene8pf.pdf
    • https://cdn.sqhk.co/zipedufipiz/jjIWifm/among_us_free_play_online_pc_no_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/98c3e62b-222d-48e4-ac8c-945a12d9830c/75714025139.pdf
    • https://uploads.strikinglycdn.com/files/9a5bc5be-8c5b-4ab8-b6d1-96e2f1b056ae/kuwegegugejunobu.pdf
    • http://pafomotaxo.epizy.com/87766772267.pdf
    • https://uploads.strikinglycdn.com/files/673e5e58-c725-4ce5-b324-384050c7187e/what_to_expect_having_an_echocardiogram.pdf
    • https://uploads.strikinglycdn.com/files/68719c2b-c0ae-4006-b033-2c7adb50c7f2/womozozuxevew.pdf
    • http://dakunexafabeve.epizy.com/how_to_remove_dark_spots_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/3a4d9d16-7675-49c9-bb4b-d816f5a3c3d6/munajager.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_off0001bbf4.bin
e8ebd5c6152008ca8016bc97154065e173f162488e4488d736c564e399f622c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBF4 5580 bytes
font_01_sfnt_off0001ced7.bin
8f5d6389ab6193bb63d62eb13266fb1677ad800f18e18586516d6f98593d3fc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CED7 11832 bytes