Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b324c069f9239a7…

MALICIOUS

PDF

41.7 KB Created: 2020-11-04 02:58:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5b172d2163ee287d82c01019cff5b524 SHA-1: 08c1256f4d64f83ac4902e2e635bd2fa9c51b28f SHA-256: 7b324c069f9239a71ff4667261f84a4157ed190a4206229cbb157c56301a53d6
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/123?keyword=the+shining+pdf+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f8a4887f114f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5f8daf46c8657.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/sujij.pdfIn PDF document text
    • https://birebojutadavom.weebly.com/uploads/1/3/4/3/134342015/tedivefuvulesobi.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/92ae0415-b1e0-46e7-b68f-ccc3d1ecb13d/27323120922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8601d36b-49d2-4123-af61-790bb0e71d05/playview_apk_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a0037c-0aa0-4e1a-b9b3-c7cd4ed948c3/xezoluvunaberud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adef90fd-e3db-4b68-89b2-ddac238e8113/company_of_women_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/92921239133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b14e88b-f517-4438-b114-8b36dceb2919/legip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67c0175-8383-4c45-851c-d66d2347f804/nabotibaxojifonedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be384be-e515-4b21-aac8-4b828aafcf0b/nakisir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879e3471-e241-434e-a328-22b59b8632e8/sexem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b23f9268-67b3-4582-9ad4-bec64232fb99/sezirivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30eef7df-9fde-4726-b3a0-471c6b77af2a/gojofezovos.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_off0000649f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649F 4944 bytes
SHA-256: 34e8fcc1d68893ecca075ea7d5d9b33866f51d5ed8da1f1fd372763f0623e475
font_01_sfnt_off00007579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 11128 bytes
SHA-256: f6b5922e1e544a30d376083b8c5828a391064d75109aa11425f783fb8841c4e6

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