Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be8b4408850b250…

MALICIOUS

PDF

44.0 KB Created: 2020-10-27 10:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 8ea2fb42d2ed7c7ef74cc68dfbcffd4b SHA-1: c52f8cfd4485576cd0d5ebea5bd4027bb40e1dd5 SHA-256: 0be8b4408850b2501a11a81ddfee1485a627892617495a3201ecd9d6a3e33fe3
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://ttraff.me/123?keyword=yellow+woolly+bear+caterpillar+range In PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/5410445.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sidobojugonuxexoz.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/puvijogole.pdfIn PDF document text
    • https://foruvojupizife.weebly.com/uploads/1/3/4/3/134352799/8036059.pdfIn PDF document text
    • https://zifidobu.weebly.com/uploads/1/3/4/3/134371145/korurisu_baguxidejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_5f9499330d955.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/fatezub.pdfIn PDF document text
    • https://lujadogube.weebly.com/uploads/1/3/4/5/134522393/6083093.pdfIn PDF document text
    • https://fobopogukigu.weebly.com/uploads/1/3/4/3/134366855/9dece3a7527b9a.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/5182381.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/1/0502/1673/0799/files/borabutimotumibasimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5386/1032/files/mebelazikijoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5178/6145/files/jefuxopumise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/welevoxadofola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff88908-39cd-455b-a803-c531c5000005/security_plus_professor_messer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f223c94-0c14-4075-973b-b4f8ebc89819/latorudotexasetib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d051dba-28ab-4cef-880d-94117e7fd7ba/60551379575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbad080b-0ede-4c49-9bc2-9cb77a3edf01/tecnicas_de_solucion_de_problemas_sentido_inverso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3912/0279/files/47890825466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1108/8799/files/kekuned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3880/files/vijisuluwuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6424/8470/files/forces_in_equilibrium_grade_11.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_off00006cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCA 5216 bytes
SHA-256: a44cde3360c5867c00d5090ccf24901e1a9a80a6bd6fbf53fb74188e021d2aa3
font_01_sfnt_off00007eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB7 10596 bytes
SHA-256: 3241484591d945f0d7df43f3b1f8174fc396bb6f685b15fdd105bf8c240d1791

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