Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b2f76b8839712a…

MALICIOUS

PDF

42.7 KB Created: 2020-10-11 19:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 9f6c3ae8b6dac5e3ee70f47ca8e1f60f SHA-1: 674df6b14a1f62d469292df531ea1e0249e2ed45 SHA-256: 22b2f76b8839712a4adbbb58cae53757d838ee694a0d09a51636cf76a1241e4f
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=wonder+core+dvd In PDF document text
    • http://zopog.sctreehouse.com/uploads/1/3/1/8/131856372/geweriwumitofuj.pdfIn PDF document text
    • http://files.catwalkgodalming.com/uploads/1/3/0/8/130814758/852958.pdfIn PDF document text
    • http://vavubo.wingsfresno.org/uploads/1/3/1/6/131606165/xosizerozuzopop-kozow-sukigigeromoz.pdfIn PDF document text
    • http://files.humanitiesamped.com/uploads/1/3/1/4/131406369/boxovop.pdfIn PDF document text
    • http://nejerof.woodlandadventurers.org/uploads/1/3/1/1/131163717/dodanajejemojuxituv.pdfIn PDF document text
    • http://files.lonestarrxassistance.com/uploads/1/3/0/8/130813373/af700c96057.pdfIn PDF document text
    • http://files.denisepaula.com/uploads/1/3/1/3/131383721/tizevakixepig.pdfIn PDF document text
    • http://files.voiceofjonescounty.com/uploads/1/3/1/3/131398253/kuzazuwazox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e88d6ab0-98d4-498a-8608-4c2d0ca81858/fedupitusubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc70e10-7f98-4a95-b8f3-26db37b38721/zuxidegotivutanima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd36170-3299-4020-9a6e-2fab790aa82b/68535046908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0524/6112/files/wilozixodinasekumavofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/5_quart_crock_pot_macaroni_and_cheese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/77656246117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/9395/1132/files/84460885364.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008236.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8236 18056 bytes
SHA-256: 7b15d287daaa862a48c6e03f64865f68a2ead01660bdd878cc58162619f09f86
font_00_sfnt_off00004f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F14 4588 bytes
SHA-256: dad4a4639514bfda4d26f5b63c8453e033befe3110ee076e33fe0fc648edaa87
font_01_sfnt_off00005ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 10316 bytes
SHA-256: 7275598a2e09eecd4ab63dbc59e2239bcd6f12914ddfb146332b53ccf30daa63

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