Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c82013b8f7f2790…

MALICIOUS

PDF

43.8 KB Created: 2020-11-04 09:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: fa9e9af1dba8ed44df408756a2139243 SHA-1: c26634416dbfe732f8175cdca57f1ec96d81a8b7 SHA-256: 3c82013b8f7f2790ae70b192eb1e95946de9f9f5acfb152f215438ebde2f60e5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/strik?keyword=verbo+tener+futuro In PDF document text
    • https://kuzewejutoba.weebly.com/uploads/1/3/4/3/134398832/8515780.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/vonokamita.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/bujukarelud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5f8be139b21f0.pdfIn PDF document text
    • https://sowofinonapira.weebly.com/uploads/1/3/4/3/134361296/9215894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f91629416177.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/c82c3f80-c131-47d1-9585-09cf1d51dc5b/zifobukeguzixegoga.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/chicago_to_uw_madison_bus.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/far_cry_4_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/pekaj.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/pipedon.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/zuzazelajoraveweko.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/lazilodo.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/east_haven_academy_website.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/hernia_abdominal_en_gatos.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/60678133778.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000087c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x87C6 17136 bytes
SHA-256: c0dab23368578d135cc0d232747bf74ce380ead3a9bc22309969fbb27fbaed78
font_00_sfnt_off0000579d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x579D 4444 bytes
SHA-256: 281343b5be009f807c3453befb2eb3bb4a0f1826bd23c0b92451e9be378fcef3
font_01_sfnt_off000066d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 10012 bytes
SHA-256: 7ea3af808fb168a4ccfd5714baf2c81e5b18ce182443f7c0038527b298ee9bce

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