Malicious PDF — malware analysis report

Static analysis result for SHA-256 57dbd0d00a3e39dd…

MALICIOUS

PDF

64.4 KB Created: 2020-11-20 02:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 08829d3d74054935e49957894a09e681 SHA-1: cbc0114806e1fae06e29a55be545172521aad5f1 SHA-256: 57dbd0d00a3e39ddc72227945a14b0bfc687b67057030fd3373fab0281de6a97
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI 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 drawing, which is a common tactic for social engineering.

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://trafftec.ru/123?utm_term=dibujo+a+lapiz+de+mujer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450634/normal_5f9e67cd3c5f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_5f920dfe42d24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469827/normal_5fa783e206de3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415334/normal_5fa0a992bfe97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444647/normal_5fb43ba957b52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f90c06a30842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_5f98c795df5e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f89fa4f5425e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f93eef9ed753.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/f75b914f-8888-4e48-825c-28420109c8ba/estudios_biblicos_para_jovenes_bautistas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a90ed5-c094-4094-967c-971244db5110/22810279973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4085eb-97e3-4890-b60d-4bf62b5fef85/sunejobirijajelezajatakob.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/20540891615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd2d0a7-9496-4ba6-8e06-2c6fa3c014ea/palit.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_off0000bf67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF67 5192 bytes
SHA-256: eaf73fdc91eb04c3de1b50819573683b79d906cae96f7bd269d52a4da20315c6
font_01_sfnt_off0000d101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD101 10592 bytes
SHA-256: 6f043624384d7fe2e72ad70ded306a491a55749b814b90b1eff1b464a3b152b3