Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4f9ac0e6076b15…

MALICIOUS

PDF

42.2 KB Created: 2020-10-03 04:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 24042416c733665223adc67425869efe SHA-1: a6350e9250469f3d2b43d7d8f9b05b297d360356 SHA-256: 2b4f9ac0e6076b15c089162189d1fb91baccb1a599dfa31b6eafaa50d2760d2a
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/strik?keyword=present+simple+exercises+5+primaria+pdf In PDF document text
    • http://sajoke.dentaldivalicious.com/uploads/1/3/1/0/131070611/durasiso.pdfIn PDF document text
    • http://files.ucporegon.org/uploads/1/3/2/6/132695629/633609.pdfIn PDF document text
    • http://rapokov.xtremeboatmats.com/uploads/1/3/2/6/132683071/2b052ac33e5529.pdfIn PDF document text
    • http://files.tax-america.net/uploads/1/3/1/3/131382274/1936092.pdfIn PDF document text
    • http://files.theyogaconnectionstudio.com/uploads/1/3/1/3/131381607/268900.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/1/0485/6761/5648/files/the_three_bs_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1052/3042/files/wigipopepanezimibap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6652/3809/files/dibujo_de_soldadura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2720/9120/files/41176551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3647/1207/files/nadupajijawowixoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc06e766-16a8-4b1a-8e1b-03d154db3ccb/duvagitenopatarat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153a2ef3-7215-4f2a-ad74-2876beab0855/71575161144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c0703f-bdd3-40bc-8c1b-415d93c60aca/basiposox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e031b2-c92c-4433-997e-ed4437894ef1/63946273189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90db9389-ea27-4ac4-8f7a-b7b9a3d93d49/34821801072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b088df3-2e86-4afd-8b05-9f0fe5aa7651/dojogokojenovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2560d123-29cc-41ae-adfd-964971d1a5d5/35864884455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93e824f-4bad-4bd1-afe2-4ab698968553/wevupikuxolozete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a695a0-bce2-4ec6-a52d-8b708367d75f/totajisozupajufutazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2269352-3744-4482-a0f1-fe3033377a1c/fudifalufikojirusudipexo.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_off000055fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55FE 5492 bytes
SHA-256: e20bd0e9b4fedc904cc06da9c57d88532c47831651864518700e01ae1b55ddf3
font_01_sfnt_off000068a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A0 16780 bytes
SHA-256: 070e57fc3e6e0cb44cc35a0f11cc7c893ea088fae1ff16194a3309be69f12ac0

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