Malicious PDF — malware analysis report

Static analysis result for SHA-256 a537fd333f5faabf…

MALICIOUS

PDF

69.6 KB Created: 2020-11-18 10:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f30857595f7bc37399ab3c8eb5500c42 SHA-1: 6f3b66aee23bb11b5f855caafff9af792ab2a235 SHA-256: a537fd333f5faabf7741b21a449e3013a026db44ece8fe71ea94e50b84020c12
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/123?utm_term=levi+sherpa+jacket+nz In PDF document text
    • https://nokemodikobo.weebly.com/uploads/1/3/4/3/134308311/6d69891d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f9c8dbfc96ef.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/luloxanibi.pdfIn PDF document text
    • https://xogupugisi.weebly.com/uploads/1/3/4/1/134109029/miponewige.pdfIn PDF document text
    • https://boseveju.weebly.com/uploads/1/3/4/5/134595203/b0e41de57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474727/normal_5fb2e523a84d1.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/b12d8bbb-f3cb-4c16-9622-c6f9875dd97c/bunul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c43904-1ef6-49c4-bd8c-9165fe1d4a66/birefeta.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/89095006788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40bdda66-31ca-4df5-9f8a-89049523fb3d/vumoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a7c999-19fc-4a8a-94bf-b7632028e6ac/lift_up_breast_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/gmp_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ebcfd4f-4de8-4a53-b847-cc2a01f3c4fc/download_link2sd_plus_apk.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_off0000d49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49A 5180 bytes
SHA-256: 46169f5ed6b2fcc09f1be3b30b6eb7e56266f5f967bd078ada16ba06ebdea673
font_01_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 10476 bytes
SHA-256: 06e84028745481b0a19ebd725602f13795eaf34ec788c6b2dad544e846d09734