Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94fa5b4b8e61b69…

MALICIOUS

PDF

71.2 KB Created: 2021-01-10 02:23:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1bf52e6485232425ef6f8a3e4259fb8e SHA-1: e083ab0eef97d4e63e65af1fc9e1c065c00734ee SHA-256: c94fa5b4b8e61b6968550588b005025c2d07115feb819d940a7c5c87e05ad30d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of an external URI and the overall malicious classification point towards a common attack pattern of luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/aws?utm_term=carry+on+jatta+2++watch+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f885230e51b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484814/normal_5fc24bb0ece2e.pdfIn PDF document text
    • https://site-1178097.mozfiles.com/files/1178097/zalezutesuwedakizivupa.pdfIn PDF document text
    • https://site-1166598.mozfiles.com/files/1166598/estreimiento_cronico_funcional.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8a2f723fef0.pdfIn PDF document text
    • https://site-1168118.mozfiles.com/files/1168118/children_s_coloring_games_free_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_5fa9aedddcbde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f8895adecb9b.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/vesubodufisi/carstream_android_auto_no_root.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/dorman_fuel_line_repair_kit_3_8.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_off0000da8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8B 5016 bytes
SHA-256: 5a4cf4f5cc8ba2c2ed2145f5593ccfac2a6aecb25f612a35ad6daedbf552691b
font_01_sfnt_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 10792 bytes
SHA-256: d983d71babc688192780f712d8048fe81fecc4aef235513c9e607192813ba516