Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf97ddfedc67235…

MALICIOUS

PDF

71.5 KB Created: 2021-06-09 06:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 30de069ed8a981f695b736c304d0efb1 SHA-1: c4cdc70c5fdf253d52062c5fd654aa9658218818 SHA-256: ccf97ddfedc672359e7c44e20df86d8977e54257b0d20a20d7a5c42ad802a3cf
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded URLs and heuristic firings indicating it's a link farm designed to redirect users to potentially malicious sites, as evidenced by the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' alerts. The document body, though heavily obfuscated, contains text related to game cheats, suggesting a lure to a phishing or malware distribution site. The presence of 'SE_LOLBIN_RUN_COMMAND' suggests potential execution of commands, possibly via embedded scripts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://oniceh.ru/pbw?utm_term=gta+episodes+from+liberty+city+cheats+xbox+360 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473637/normal_5fce5cbbe7e62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_6019a3005591b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403684/normal_5fcd047bf2fe5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144578169/koremukan.pdfIn PDF document text
    • http://pamijokoja.pbworks.com/w/file/fetch/144776583/5232509529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c0d9d4-35de-434b-acb5-888e0b7f798b/monster_in_paris_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c96bd5-552e-400e-90ae-90b4435245a9/how_do_i_contact_manpower.pdfIn PDF document text
    • http://garigor.pbworks.com/w/file/fetch/144424092/gavonurejep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/003d77e0-7fc0-49f4-89c1-6a1ad415e211/85183896129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8e1f29-448a-44a2-8ac5-4a6bc9ad57c7/how_to_calibrate_a_cobra_29_wx_nw_st_cb_radio.pdfIn PDF document text
    • http://xizalow.pbworks.com/f/20458878419.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/f/leccion_2_aprende_a_tocar_piano_desde_cero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c918c2a-3b44-4c97-9261-fb91481d1dc1/stock_exchange_hours_christmas_eve_2019.pdfIn PDF document text
    • http://tujelupirobe.pbworks.com/w/file/fetch/144500703/what_day_does_school_start_2021_qld_2020.pdfIn PDF document text
    • http://gupiguna.pbworks.com/w/file/fetch/144805914/38226408815.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/telugu_crime_novels.pdfIn PDF document text
    • http://karulimomaw.pbworks.com/w/file/fetch/144915522/tarotiwudijazapumizori.pdfIn PDF document text
    • http://vejivab.pbworks.com/w/file/fetch/144559533/pabelorilapotezezibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08212938-3bf3-4fc7-9aaa-ad837c542d6d/ti_84_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07ad480-b137-40f7-9acf-8314a90e122b/64374311198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa2d992-c369-4af7-bd21-710d6acf8872/windows_powershell_download_64_bit.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/f/piano_tiles_2_unlimited_money.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 6196 bytes
SHA-256: d169da63398074ad7d828b5fc420afea0c390f3793a6137a4d4f3b3c17c8e1cf
font_01_sfnt_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 10116 bytes
SHA-256: 73804add23256c949adb0d4e1b2d1cbce05a1e49a8bf97df4ccac3456b7416d0