Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffdc04545448ed1…

MALICIOUS

PDF

72.5 KB Created: 2020-11-24 10:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0b5713e7c9b0d670138dbb6e5b5769a7 SHA-1: d2aa2f354189cde8f31f85dd09cf543fe5ae4eee SHA-256: 0ffdc04545448ed1b503e319de505941e98b49d950fc404ac73051e94228bbb2
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to contain a lure related to color mixing, likely intended to trick the user into visiting the malicious URL.

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://traffset.ru/123?utm_term=orange+and+yellow+makes+what+colour PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500669/normal_5fad6fb104a02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450047/normal_5f9fefda0d38a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f997be052945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426682/normal_5fa130053118e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_5f9080d2aeb83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ed2c9eff-f5d7-4642-ba57-9eeb051519d0/vanokuwafuxobofib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b72727-9aee-4bb6-8f41-6956a2d19364/ibis_paint_x_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/45603508395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c8abd0-9765-4d2a-ae7d-c9530eb36470/13070832309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72091e4-830f-4489-99e7-6456549dd3e4/91631073310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f53ad07-304f-4e53-ba94-004ba729836c/galonuleteru.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/cambridge_latin_course_unit_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93cb85ee-1d13-4ed0-b8c0-d8f5f0f3aa5a/bofagekibexo.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/csr_high_level_committee_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77357c80-544f-4937-8491-ba94924313bd/tez_kapak_rnei_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de94514-367b-449f-969d-8841212bf54e/craftsman_7800_pro_series_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d29e61-1f1f-452b-abf8-f03c4631a2f0/27187603780.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F4 5472 bytes
SHA-256: 7501e8ba869e94db6421d5ca7bf33c9574a755491fc2dce79eeab2618afdd28d
font_01_sfnt_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 10692 bytes
SHA-256: 68c5fa530ba89db8e04bcf47f32acb94f9836c008008f1792c0adfc5b7a84550
font_02_sfnt_off0001069a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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