Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e676cee01444b95…

MALICIOUS

PDF

74.1 KB Created: 2020-11-22 04:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8a883115bfe20800eaed0a5f94a56be SHA-1: 1e405eb337378fee60f0e226e38e2b7c65bcd03b SHA-256: 8e676cee01444b95c6212371d6e3492b598ffb24e5d4381c33932ffcb15c9241
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, traffset.ru, which is flagged as malicious by ClamAV. The document body, though heavily obfuscated, appears to reference the URL's content, suggesting a phishing or malware delivery attempt. The ML classifier also strongly indicates maliciousness.

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=the+healthcare+quality+book+vision+strategy+and+tools+third+edition+pdf
    • https://cdn-cms.f-static.net/uploads/4409243/normal_5fb283522f94a.pdf
    • https://miwebakoz.weebly.com/uploads/1/3/4/8/134862152/puvedobudadew_gewuxikatufe_disomekaxev_vukeza.pdf
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f9b67e4b4d33.pdf
    • https://ligavovifoma.weebly.com/uploads/1/3/4/5/134522072/gobixipodunewat_duvitomezuniz_fasejegavipe.pdf
    • https://cdn-cms.f-static.net/uploads/4413983/normal_5fa393eef0d00.pdf
    • https://jedebesoza.weebly.com/uploads/1/3/4/7/134739829/7032556.pdf
    • https://cdn-cms.f-static.net/uploads/4387061/normal_5f988bea63969.pdf
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/vurobis-xirevanukabibuk-mewimazeso-lemixerovij.pdf
    • https://cdn-cms.f-static.net/uploads/4370285/normal_5f88577e27a56.pdf
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f9d626d1dda9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/01e1d5c0-f929-4373-855b-7eccf1672411/kusoko.pdf
    • https://uploads.strikinglycdn.com/files/f6dd5cdf-e691-45f6-a6a6-b882769a8553/tagelus_sand_filter_manual.pdf
    • https://uploads.strikinglycdn.com/files/c21422ee-1e9e-4101-8308-f2755fa5ecdc/of_the_father_s_love_begotten.pdf
    • https://uploads.strikinglycdn.com/files/23337980-2514-472c-bc0b-5d4960a7df60/denulemanejapuwowelapi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d70f.bin
db2b87e2f74bcf4d88d62c29a734b1ea3bb4f4d8ebbcb1f80dbcf4b750aa7e23
pdf-font-stream PDF embedded font (sfnt) at offset 0xD70F 5740 bytes
font_01_sfnt_off0000ea8f.bin
eec965032b6e9784512c450266b5907ec2dbc2d4808cea8381c67e803711d5e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 10008 bytes
font_02_sfnt_off00010cd8.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 4324 bytes