Malicious PDF — malware analysis report

Static analysis result for SHA-256 64931bf74f1f4126…

MALICIOUS

PDF

60.9 KB Created: 2020-11-11 07:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4eae8dcd1a4a93a73cec3653ef9f1ca1 SHA-1: 1524753c87903101803f2e70a5801b93969bd338 SHA-256: 64931bf74f1f412636d2632a4651cda703827a983a76145e292004a721796026
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. ML classification and ClamAV also flagged the file as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?keyword=linear+equation+standard+form+worksheet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_5f9abfb94c223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f891afb70c32.pdfIn PDF document text
    • https://wizamezuladad.weebly.com/uploads/1/3/4/3/134351213/0c252d4640204c2.pdfIn PDF document text
    • https://rezojitelato.weebly.com/uploads/1/3/4/6/134649293/1037190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f8f390bcc784.pdfIn PDF document text
    • https://daxozeke.weebly.com/uploads/1/3/4/3/134322415/riwobojokosamoz_mogokenovokoko_dunewubafovinas_fomogij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_5f9184694bb84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5f91fb39aeb73.pdfIn PDF document text
    • https://sewizejego.weebly.com/uploads/1/3/4/6/134679492/e51619ee.pdfIn PDF document text
    • https://letitelow.weebly.com/uploads/1/3/4/5/134500939/2131101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420451/normal_5f9894c234d9c.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/abcc2133-23b0-4852-a311-d5e97ec8261e/swtor_carnage_marauder_5.6_rotation.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_off0000b150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB150 5472 bytes
SHA-256: 817979096ea4ca6c6a37f0cda6f447c86d5b02bfd820d0e3482cc8c9a1be52a0
font_01_sfnt_off0000c3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DA 10304 bytes
SHA-256: 4a9dc0b3202df721d132b80948d3995f98ffd46e26a61c76740f2d5fc1934216

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