Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f506b906ebd4b60…

MALICIOUS

PDF

66.4 KB Created: 2021-01-14 12:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c6dcad98c162af1afe0e5214bc537991 SHA-1: 5db3876e1919f7fc4e3681de61e0437e69ea201a SHA-256: 6f506b906ebd4b60714b4056ab15a98b6a8c7b6f69b6b08067faeaa725456859
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 'trafffe.ru', which is likely a malicious domain used for further exploitation. The document body, though heavily obfuscated, suggests a lure related to sheet music, aligning with 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://trafffe.ru/aws?utm_term=gipsy+kings+bamboleo+sheet+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479223/normal_5fad92437ea0b.pdfIn PDF document text
    • https://site-1235942.mozfiles.com/files/1235942/62535564818.pdfIn PDF document text
    • https://site-1180537.mozfiles.com/files/1180537/dreamworks_universe_of_legends_download.pdfIn PDF document text
    • https://site-1252473.mozfiles.com/files/1252473/fivem_loading_screen_template.pdfIn PDF document text
    • https://site-1176996.mozfiles.com/files/1176996/68309735203.pdfIn PDF document text
    • https://site-1174730.mozfiles.com/files/1174730/gerinosovilirazaveja.pdfIn PDF document text
    • https://site-1180825.mozfiles.com/files/1180825/game_of_thrones_lannister_theme_song.pdfIn PDF document text
    • https://site-1175023.mozfiles.com/files/1175023/blossom_blast_saga_free_download_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_5fae312a82ee4.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/vukumesoj/app_cache_cleaner_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/lorem_ipsum_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/86205708485.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/donowiziterusokemamulup.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/73836006482.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_off0000c367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC367 5588 bytes
SHA-256: 0167ceaeeda194256d5b3368cac1b4a5605f665844ff2d1129ffc8a923ef2de3
font_01_sfnt_off0000d651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD651 11412 bytes
SHA-256: 0471ae665c51b164b336191642b1af2c6a6fd74d53baffe394287f71d0231a8f