Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b451cf7ff205f6…

MALICIOUS

PDF

66.9 KB Created: 2021-03-06 16:27:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: cf58e134fae20f9adc5162975c609b7d SHA-1: de3283e22976a5b90d595e93a6e8387488c4ce79 SHA-256: b9b451cf7ff205f6c98d0f0822534a3b087f444103bf08ffe8658956a3337df6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/award?keyword=ph+scale+worksheet+middle+school PDF link annotation
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/tapipixomagaxizosub.pdfIn PDF document text
    • https://tekeginisexufu.weebly.com/uploads/1/3/1/3/131381150/senanawugolijega.pdfIn PDF document text
    • https://zuzilumapodebaj.weebly.com/uploads/1/3/1/3/131382406/vobufolutufoxoseje.pdfIn PDF document text
    • http://didopikorubozav.iblogger.org/digimozoderom.pdfIn PDF document text
    • http://vebenuzan.22web.org/82893507592.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/libosokune/jawegevor.pdfIn PDF document text
    • http://vupafigimewex.rf.gd/rural_agricultural_marketing.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/arithmetico_geometric_progression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67462009-b1fc-4f29-aec3-8dbd16020f08/jujewoxekomaji.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_470030e4c6cf45c780613877a72ebd5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd1cefa8-1285-446f-97fb-2f6d5969fdd8/84858259855.pdfIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_3c887765f60e47d1ac4472b7c9253592.pdf?index=trueIn PDF document text
    • http://fisazivibutaz.epizy.com/gimomirilumivufow.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/gujalufuvifapifepasel.pdfIn PDF document text
    • http://sovizaz.epizy.com/chirutha_cinema_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/b._e_full_form_in_english.pdfIn PDF document text
    • http://velevemi.epizy.com/biluwotikijedona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638ed3b5-b744-42ed-a2f2-1e51133cd3cf/sony_rx100_vii_best_video_settings.pdfIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_19ab07137ee94fc9a4b53b697f0d6025.pdf?index=trueIn 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_off0000c74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74F 5336 bytes
SHA-256: fe99e880c17229d241f022df79d73282a178f41f7277cbff668e7c9deffa2764
font_01_sfnt_off0000d95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 10312 bytes
SHA-256: 1c730814e9911b0cfeac68b8c54b3653eabec47748e26e063910481967dfd5ae

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