Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe93fb8f79694bb8…

MALICIOUS

PDF

75.3 KB Created: 2021-01-31 10:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ca2907caa853866bcf956b0f7de10278 SHA-1: 82c778f4d2134f5a08469fe181ae5da46bb6f832 SHA-256: fe93fb8f79694bb805e50e65decbf63d5e0c4a2a2a61dd749e208eb8361e8d92
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL being https://seumenha.ru/123?utm_term=happy+anniversary+speech+to+parents, suggesting a phishing or credential harvesting attempt. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, indicating it was likely generated programmatically to appear as a legitimate document, further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=happy+anniversary+speech+to+parents PDF link annotation
    • http://prazdnikprosto.ru/17268592688ogb3z.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/gfgikp0/sacred_sword_princess_mod_apk_1._10._1.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/xOjjmLF/slimeatory_game_online.pdfIn PDF document text
    • http://funseeds.site/agri_coaching_notesfsh2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_6013e2cdecfe1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445118/normal_6003d082434a6.pdfIn PDF document text
    • https://cdn.sqhk.co/puberufibo/8hirhe6/ssbu_ice_climbers_desync_combos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5ffbb7e50125d.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/e2Xbgff/zewijutasupodo.pdfIn PDF document text
    • https://cdn.sqhk.co/duwefetufe/njbgKQT/70232185724.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/vrhfFif/17035180345.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/Vzgjw29/hide_me_vpn_free_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/GgVhfv3/5317396730.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/gigxrjI/funny_short_video_clips_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/hgChfRi/hollywood_undead_paradise_lost_lyrics_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/aLLishb/video_of_tuberculosis_patients.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 5112 bytes
SHA-256: 59e95bd380c0428ac8777e2f87fa6da0c9c189e392fbda0a56cdc2065198f016
font_01_sfnt_off0000fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 10212 bytes
SHA-256: 9b0fc0a633eef2bdf46e5c7775b470f74c3e0b5cdc67782a1c5eeb446716f032

Open this report in the interactive analyzer, or submit your own file for analysis.