Malicious PDF — malware analysis report

Static analysis result for SHA-256 a442cf29e502d6a0…

MALICIOUS

PDF

45.6 KB Created: 2020-10-16 07:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0c327f82f30243272886d2a460f5d129 SHA-1: 6a38e6577c38084936bc9e0af997e5f55c3be81b SHA-256: a442cf29e502d6a0c612783098835f58c25494ef665141189b5eb92e6c035ee2
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/123?keyword=showbox+apk+download+version+5.11 In PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/lepuzisukawe_judul.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/jalam-ralenunu-ditejananireki-jetetexud.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/vititobiwisib.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/60aaf24b9477fe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f888ac318d0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f88cfa0012f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f87a539389b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2825/0276/files/summoners_war_necropolis_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9831/1323/files/cosdac_programas_de_estudio_componente_profesional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7800/3109/files/tomtom_mydrive_connect_not_downloading.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6181/9584/files/tuxizufono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1991/1335/files/79445454559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/kaai_yuki_v4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/manual_maquina_de_coser_singer_florencia_45.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/414ab51e-6342-4263-8955-917880cbd186/27187156302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca64dde-dba5-47db-aea9-a2d48159cae7/5605544608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2490d3-5941-48f5-996a-a28ae6cfaee9/wisevodokosuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aece1331-a8b4-4469-8092-bab83e2bac83/dijibivabebopagapelinapiv.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_off00007110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7110 5780 bytes
SHA-256: be6a71583a3a47c05b82d16e22a642cfd502a46eda143d44cb791eab09be24e5
font_01_sfnt_off000084d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D3 10704 bytes
SHA-256: 22388f02eaf303df6334b25315e4f4af906d31d237df3604ce38a5d7784aed49

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