Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef78a2e2448248b…

MALICIOUS

PDF

85.5 KB Created: 2021-05-31 17:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ee288f375597f852772af5d5d91f27e0 SHA-1: a5157629421029629856a2f783c67f0b8231aa2d SHA-256: 9ef78a2e2448248bdc69262d4d0a9c9b517a73c52c7a581aed9d7e0b070aba15
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/123?utm_term=intel+core+i5+9600k+overclocking+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417645/normal_605fb37da62b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fd091b55e43c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_60478111b02ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380230/normal_6006a8d9d598a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_6047d1afb1f1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369643/normal_5fe26786b7374.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5fcdb36603a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_604a8680ac323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_600a6bdb17c1f.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/27e77156-e13d-40b3-a5f3-5a53b62ff545/present_perfect_continuous_tense_worksheet_for_class_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c8b86b-2bd6-4723-bf70-0443eabe7499/auto_off_biddeford_blanket_says_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c4ef57d-cbd9-4ceb-ac6a-6afffa03e528/on_the_incarnation_by_st._athanasius.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8512de73-75bb-4549-b294-77dc6e1e6087/uniden_powermax_5.8_ghz_handset.pdfIn PDF document text
    • http://fuvesiwowegu.pbworks.com/f/davizabaxererabixavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1971680-dae0-4bcc-93f2-069406125228/the_ultimate_beginners_guide_to_real_estate_investing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e29880-6a5f-48b6-ad45-380d4fc25d81/i_m_a_rider_song_lyrics_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c83312-2171-4b6b-8ade-030d818359a2/how_much_does_a_cia_special_agent_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4adb2ae-2fd6-4fa3-b466-6fa8cd8c16de/tubofimuwazofopefelav.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144411645/how_to_connect_vizio_wireless_sound_bar.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/read_law_of_attraction_books_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c213a061-40e9-4ca7-bee9-a3a36202e493/hayward_aqua_plus_salt_system_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c35cee4-d4d1-47ad-a381-384894901468/nuwevek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcf872c-f8cc-401f-9943-0580e8a2f0b8/how_to_use_neatcell_picosecond_pen.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_off0000f431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF431 5356 bytes
SHA-256: 833166a66fcc39a5d2b34263301fb9dd7ac56d13fa5dced0499a0981022f7518
font_01_sfnt_off00010684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10684 14348 bytes
SHA-256: e101a206741d1c345489d3312a44bd5e325c1fc674ac3ecee27d87a6e4f4c075
font_02_sfnt_off00013379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13379 16060 bytes
SHA-256: d8a1a34de14a7b8fce5e51635835121d353d188f9ac9ce1e11538509fd4c5cdc