Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9850148c909db96…

MALICIOUS

PDF

72.3 KB Created: 2021-03-11 20:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1075043bfc4c5a17f27c2023b42ef7ea SHA-1: 19e107e523e0eec96ce3985f58b330460f90f917 SHA-256: b9850148c909db9632a8f82c413463fa0eadc99bc8eb3529c19f865ea4dcc21b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://botokaw.ru/award?keyword=nacionalidades+en+franc%25C3%25A9s+pdf PDF link annotation
    • https://loleritukala.weebly.com/uploads/1/3/0/9/130969936/ee1477b9efa6de.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/xexokezimut-majumugoxugu-wodaluno-megatub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451766/normal_603e6c8887c80.pdfIn PDF document text
    • http://wosozage.mypressonline.com/wiwiv.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/83272367728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382405/normal_5ffddbe8b84f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404133/normal_600a082e104b9.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/dedokubiruluwon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496381/normal_60258f820c17c.pdfIn PDF document text
    • https://xajekedifa.weebly.com/uploads/1/3/4/4/134469171/1c4dcb493915cef.pdfIn PDF document text
    • https://jelonuzekuxenu.weebly.com/uploads/1/3/2/8/132814084/baveduxekoveraxib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_602ac3d830ac8.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/luramamelolem/64420477190.pdfIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_97b5bb5e5a534e2aa35bf8ee8c495c66.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/papuja/kenunozafok.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/glue_plexiglass_sheets_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8991aaa-151f-4623-bf99-eb90c5edcca6/bemotomizasela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da140e4-1afb-49c0-993d-bce6f52778a8/dell_e207wfp_monitor_specs.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_fb21f7c4b605426f8e4f11c7b57e40ac.pdf?index=trueIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_d2cdd21d34ef4b19bd135230780bdedf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/befaloj.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_off0000dc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC33 5260 bytes
SHA-256: 332b5d779474df8cb86588086b4f19da6be60d3bb58c9df9aaa4e05cd640e1e3
font_01_sfnt_off0000ede5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE5 11124 bytes
SHA-256: 3d38c285a65f7360a86b5fd5a428c8ae14fd0dc19e10e1df661cb1f20956648a

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