Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd5ea92829970c9…

MALICIOUS

PDF

79.8 KB Created: 2021-06-01 18:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 14230ede99f19554a4a5f465a4434fb6 SHA-1: af1ac1410076a1ee89f7679e2556d5167dfffa67 SHA-256: cbd5ea92829970c97894beef75de4be56900be53533631a0f6c9279cf0d7bc32
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 URI pointing to 'inwebjor.ru', which is likely the malicious destination. The document body, though heavily obfuscated, contains references to 'Pirates of the caribbean dvd game' and 'wkhtmltopdf', suggesting a lure to a fake download or media site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://inwebjor.ru/pbw?utm_term=pirates+of+the+caribbean+dvd+game PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419654/normal_5fd0e482d2ba8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446151/normal_5ff506bdb07a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494435/normal_600bf00eccab3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368503/normal_5fcc57f591076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5fd79a3c8132b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504568/normal_5fc831d2b406b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_60381e160d0c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_600ff563cb89c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_603e673884fbb.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/046eaaa7-3c8f-4083-8963-b41dc34142f6/kedexixorafapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23dc253c-9519-4999-8c74-7acece8bdb72/gifted_hands_ben_carson_story_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe6f5d5-b590-43eb-af7c-e7d3e474c168/married_life_up_piano_sheet_music.pdfIn PDF document text
    • http://pitevaj.pbworks.com/w/file/fetch/144423165/lutugekowuboxewagaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc56096-3b98-45b4-8b3e-de1033ba5941/7870961189.pdfIn PDF document text
    • http://sokulus.pbworks.com/w/file/fetch/144467295/62459823403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0354dee-fd5f-48ea-82ab-f86010785207/19611968937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c4c2b8-474d-4c94-bc80-615cb537a4cf/how_to_gain_more_tiktok_followers.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144420459/51806729983.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/manudoxawuwuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf50ad59-8973-464a-861f-b7caca44d318/4323484962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90c758d2-b9a3-4755-a958-cbeb9b2d502c/kemper_profiling_amp_head_bk_s_bundle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8af76de-3ef0-40b6-b5cd-c3652fd33ce6/toro_724_oe_snowblower_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f7fefb-da43-46c1-a562-f78c7e6beaad/16505708703.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 5604 bytes
SHA-256: 51cd1aaf8894ad3c97f56edf4241d9e5b57f2436d04b29a6ff5b7a2772deee2f
font_01_sfnt_off0000f598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF598 11196 bytes
SHA-256: 517d6b35b54a314eca2241870181aae1c8792063b317bbea6bd271979213ea2a
font_02_sfnt_off00011bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDF 16204 bytes
SHA-256: 73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502