Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d664953a2121b49…

MALICIOUS

PDF

40.4 KB Created: 2020-10-28 20:38:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f9e628f3f36fcf0050187099378f8f73 SHA-1: 94a650a628d863ddc0dbb451afe432973402285d SHA-256: 0d664953a2121b49c82e2308bbcae16c2ca47a906cb31819d8c62e4fc2df0d0f
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/aws?keyword=kpop+desktop+wallpaper+tumblr In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f88300f6e3de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f88662dc82cd.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/7949030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f920a0021ad8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f88066634ae3.pdfIn PDF document text
    • https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/witenemadefosoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5f9678628619e.pdfIn PDF document text
    • https://mulodunewumil.weebly.com/uploads/1/3/4/3/134314444/c088e31270770f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00005f81.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00005f81.bin)
    • https://s3.amazonaws.com/xukonakefules/losulesitikunirewijivitu.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/mepenumofikavuvufoko.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/jepofefeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7125/7241/files/walking_on_the_sunshine_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/32462098729.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/dufefupepiwizoku.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/annuity_and_perpetuity.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/sijoxutasodope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3032/1568/files/murusawofetovewenawum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8500/8541/files/pivabepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7126/1854/files/tiwuvonejax.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 extracted file (font_01_sfnt_off00005f81.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52E4 3484 bytes
SHA-256: 9e29ed28ed44ef8a30dd3c6701ce08b907b855e01ace95335f96997e56118942
font_01_sfnt_off00005f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F81 5372 bytes
SHA-256: 3410826e902187b240365b7511c47dda242b4cdd186223c314786e484d68afe4
font_02_sfnt_off000071bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BC 10116 bytes
SHA-256: c5f4d4d157cad83425af8b03884dd3006973cf222c0a29864ea9b049ba56537a