Malicious PDF — malware analysis report

Static analysis result for SHA-256 d753f084c5e17f33…

MALICIOUS

PDF

46.3 KB Created: 2020-10-27 12:23:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c416b27fc8509cd8e31e2d7a88ddbf26 SHA-1: 4363693e4e278bea3a70af6e338a2b03e91c2bf0 SHA-256: d753f084c5e17f33dac7d23edec238767a38631886a1cf21bb577fd3c25881f5
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://cctraff.ru/strik?keyword=large+biomes+minecraft+reddit In PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/33f825c3ca9.pdfIn PDF document text
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/rozeketula.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/fd026ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/felasorarabipis/panorama_chaines_canalsat.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/antiarritmicos_clase_3.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/44964623786.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/zimopewivoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/organizational_barriers_to_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/ipl_2019_schedule_list.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/dedulifukuvutukozojo.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/15433905177.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/78706264145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7097ad4b-9ac5-45c3-9058-e37ad8634b71/47420110518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c32e4c-9768-4005-8b02-1e796f16efb1/puvifedudazuwoxazabuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0194b6f5-9aa5-49af-b6aa-7575366a86f4/42277877042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e0c2be-517b-4d47-8380-ab281711eed0/42867620954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c4a18a-6c42-4d2b-8164-b928d7477cb1/mamuvibumaxuxak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46787b17-32ee-45fd-bb14-318d337d406f/novober.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68bb7921-cdb0-44cd-945c-94dbd9d250a8/teguregijapodivimuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ef1676-ccec-48e2-a14e-9b8418165ab9/70406490308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5bc0b0-6f02-43fc-a9b7-54ffe73d32c6/lanoxezawujisajasize.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E5 5176 bytes
SHA-256: aaab38f8e5772f53b6844d3f7327a5230ae44dd8b8c3c1bb1be4f1cff347233d
font_01_sfnt_off00007b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B61 10036 bytes
SHA-256: d15cd62c81e018e018be508438c364d21f2a0d07429d9dabf0d5e9e7a8781479
font_02_sfnt_off00009dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DBC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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