Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dbcbee82453b52…

MALICIOUS

PDF

68.7 KB Created: 2021-01-03 02:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e82b2ec5653beeb833b3cd9b3af0291c SHA-1: 50b6d4aa9d439a02c759e9805a8512881977b7dd SHA-256: 96dbcbee82453b528878bd0faa39be1ca0031a7b0ef5af445a28b1296fc724d0
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'trafftec.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'gastroscopy report'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=understanding+my+gastroscopy+report PDF link annotation
    • https://cdn.sqhk.co/kuvapipitol/ierjjBp/square_bird_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vumulevezuf/ihajhQK/packers_tv_schedule_today.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/hchgjfn/74436949643.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/8d3937d0-24bd-43c2-ab17-38eee48c509d/78115572202.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/tokatubuvununokeru.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/soribidibape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a3374b-f70a-4727-9708-1001a4a52a80/chimney_hill_estates_farmington_ct_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff9f8e3-6386-4ccd-b63e-6f41a227d89f/desamupopop.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/mibeme.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/windows_8_64_bit_bootable_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85917fa3-eba4-4073-8d33-091f780ea9d3/xazamolidejubezin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1cf825-629c-4bb5-9992-55f7fb18e679/manual_de_diseo_urbano.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_off0000d246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD246 5452 bytes
SHA-256: 3f318a8a92490a9cdb2e0c43c9047b5e6c14aa5bd01c6facc90b106419ca7c70
font_01_sfnt_off0000e4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CA 9816 bytes
SHA-256: 85c145fe54d02520daeee37915c8a7726a92176c7d4ab2d73010e33a52a110f9