Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb37f0908dc0857…

MALICIOUS

PDF

72.3 KB Created: 2020-12-31 03:13:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5c455204b28a4ead379b43226bd17f7e SHA-1: 873e344bbab99f3c53d2e7795f76e174dd17ae93 SHA-256: 8cb37f0908dc085726c340e6d423f430bf126d728f53c791ac9225094d358e92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://ggtraff.ru/123?utm_term=nsda+nationals+2020+tabroom, is the primary indicator of malicious intent, likely serving as a lure to a phishing site or malware download.

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
  • 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.
  • 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/123?utm_term=nsda+nationals+2020+tabroom In PDF document text
    • https://cdn.sqhk.co/wunemuruk/hQ8ggjh/tap_tap_dash_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407994/normal_5fed1f2b77be1.pdfIn PDF document text
    • https://gevupowola.weebly.com/uploads/1/3/1/4/131483584/jorufag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_5fe79598dde77.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/igjiggi/89781035012.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/xjaier4/58317625873.pdfIn PDF document text
    • https://kalodobig.weebly.com/uploads/1/3/4/4/134432105/mopoxowodujizin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_5f9a1ec644076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f8af6e3dfd1d.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/genukopapovixo/88588303322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4b9da13-e427-4024-9dfe-b07f0b465073/lunobipobebuxusikopepekaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0b0d3b-c289-4145-9e36-27d38fb01266/91086555293.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/wifakesaratibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d7fed6-cee5-4114-8688-33d0aab7d422/54717142751.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_off0000dd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 5352 bytes
SHA-256: 84c5ba4a5bfa9503f6130a51a3205656f38352fbe36e82ca48aa3dbd822e45d0
font_01_sfnt_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 10752 bytes
SHA-256: 5e2473d6af03616d0e65184f28eca06baca85c88d50c1b9caaf85e94cdf0f4db

Open this report in the interactive analyzer, or submit your own file for analysis.