Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b02158646ba91c…

MALICIOUS

PDF

75.0 KB Created: 2021-02-25 20:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 00b5dde2f374fb0c9e65cc40119da7af SHA-1: 9e86007ea02e355e7c84e09b4ff49956cdeec339 SHA-256: f4b02158646ba91cc4a0c47d2c951fc72bcc8cdadab4a27b416926ca74ba9705
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to car alternators, suggesting a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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://druttle.ru/award?keyword=como+funciona+un+alternador+de+auto PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452853/normal_602c21e5bb27a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474998/normal_602c6ff243918.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368998/normal_5fc72b4a99e65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477886/normal_603675ea47575.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/jepakamuvusozelavizokifiz.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/app_store_free_for_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/charmed_season_3_episode_23.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/what_is_the_definition_of_common_sense_knowledge.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/13900723375.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/currency_conversion_in_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/44051968935.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/electric_renewable_energy_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/amazing_hd_wallpapers_for_mobile_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/password_keeper_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/across_the_universe_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/alffy_rev_tanah_airku.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/31999825444.pdfIn 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_off0000f0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A0 4896 bytes
SHA-256: 1bd03822bb5fe7ab5ba3f8e7d4a89edf97a343323399294ef19bb97a4eed23b8
font_01_sfnt_off0001012f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012F 11768 bytes
SHA-256: 133b6bb9e5be5e857d25fb3cedadfe15dc59792d549f7e03413a9b3b7087e099