Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabf241cf0d8a88d…

MALICIOUS

PDF

72.0 KB Created: 2020-11-18 08:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f76021f7b08a8046caf36b14edb6bf2e SHA-1: 19d112eec301294c7672dc5004ab84322b2a8400 SHA-256: cabf241cf0d8a88da25fa829dec83c5e16b705908a644d85ca505a2a12380a03
154 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded URL `https://ggtraff.ru/aws?utm_term=who+cholera+fact+sheet+2016` is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest an attempt to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/aws?utm_term=who+cholera+fact+sheet+2016
    • https://cdn-cms.f-static.net/uploads/4475861/normal_5fa9a23bcb640.pdf
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f88da007a8b5.pdf
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/dujulovukopofelig.pdf
    • https://cdn-cms.f-static.net/uploads/4417653/normal_5f9f0b885c742.pdf
    • https://cdn-cms.f-static.net/uploads/4450624/normal_5fa921f0268eb.pdf
    • https://xugasejesakegeg.weebly.com/uploads/1/3/4/6/134617370/600f98b986.pdf
    • https://cdn-cms.f-static.net/uploads/4416316/normal_5f95d4dde11f4.pdf
    • https://cdn-cms.f-static.net/uploads/4448339/normal_5fa31b0752859.pdf
    • https://cdn-cms.f-static.net/uploads/4421042/normal_5fa1106f75acd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e60dcd41-8c39-440d-9427-8204869cdfa1/8874140912.pdf
    • https://uploads.strikinglycdn.com/files/f97725aa-7272-46b7-9717-7b420ad35372/41463424054.pdf
    • https://s3.amazonaws.com/henghuili-files2/vavogasezuwozulo.pdf
    • https://s3.amazonaws.com/zeworibuzoza/bharti_airtel_annual_report_2014-_15.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d93a.bin
793c6a071ca79e535866d37e891811ca775c1e1f987e3a36a5143f2ca54d8e08
pdf-font-stream PDF embedded font (sfnt) at offset 0xD93A 5460 bytes
font_01_sfnt_off0000ebdc.bin
2caa372c271ecd9802b9faffb7760a32f66e85fcb8710e819409ab5e42dd5891
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDC 11652 bytes