Malicious PDF — malware analysis report

Static analysis result for SHA-256 62726301f610f103…

MALICIOUS

PDF

42.2 KB Created: 2020-10-05 04:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f5cfa3d2944db7e9e9ba7d1f05f4db5c SHA-1: 63a52193fd1f19c68dbb8a04f5d4a0e6f2b0937e SHA-256: 62726301f610f1032d6c6c780ea07f56307661dea34e287ff6cc35d69cd92d22
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=spanish+definite+article+worksheet In PDF document text
    • http://podibeda.ggsweetmagnolias.com/uploads/1/3/2/8/132814838/cc1c4e26.pdfIn PDF document text
    • http://files.podiatryatknox.com/uploads/1/3/0/7/130775192/9d7da9ddc.pdfIn PDF document text
    • http://mawosaz.kennettchristianchurch.org/uploads/1/3/1/4/131438759/xonexuribefikiv_makajawijid.pdfIn PDF document text
    • http://files.charishomes.com/uploads/1/3/1/8/131871537/tukuzasu.pdfIn PDF document text
    • http://rusujudo.garytwynam.com/uploads/1/3/0/9/130969426/dotubizezinowe.pdfIn PDF document text
    • http://files.marzipan-media.com/uploads/1/3/1/8/131856184/7584706.pdfIn PDF document text
    • http://nabaviju.bonejourdoggiebandb.com/uploads/1/3/0/7/130740393/7398265.pdfIn PDF document text
    • http://files.elainekielykearns.com/uploads/1/3/0/7/130738796/4d327571e57e639.pdfIn PDF document text
    • https://site-1036884.mozfiles.com/files/1036884/64270117818.pdfIn PDF document text
    • https://site-1042419.mozfiles.com/files/1042419/jirixukazovirufakako.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/tugasivolepov.pdfIn PDF document text
    • https://site-1041173.mozfiles.com/files/1041173/39938389300.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/1/0437/9597/2256/files/sulawakunilogaxoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/7202083286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3628/5860/files/heisler_chart_cylinder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5842/9089/files/livestrong_elliptical_ls10.0e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3067/0240/files/69586832789.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_off000066f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F1 5500 bytes
SHA-256: 28ee41ffc897553e028e6e54ce44a9931ba10c0fd303c910ac5013d41a193500
font_01_sfnt_off000079b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B8 10000 bytes
SHA-256: 62dbe561611d9a28ea6e406621ad16e0c41b69752d983472a5996a01df709526

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