Malicious PDF — malware analysis report

Static analysis result for SHA-256 2747691f2e93da57…

MALICIOUS

PDF

39.6 KB Created: 2020-10-04 02:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17d8f578f0f58f0eda25deceb60b9589 SHA-1: eaef291d88a4cd3a905a8b142608228f503e7105 SHA-256: 2747691f2e93da5797ca929dc12f72404976cc7c648decfbd4bedbc0aafc3315
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a prominent link that redirects to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body and embedded links suggest a lure for downloading potentially unwanted software or malware. The ML classifier also strongly flagged this PDF as malicious.

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.
  • 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://cctraff.ru/strik?keyword=wevideo+pro+apk+free+download In PDF document text
    • http://files.katyschutte.co.uk/uploads/1/3/1/4/131452836/xupejujaloxomajegiva.pdfIn PDF document text
    • http://lopil.brasasperu.com/uploads/1/3/1/4/131453329/ce628987ff.pdfIn PDF document text
    • http://files.washington-scottish.com/uploads/1/3/0/8/130874318/8b0f395751b7b3.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/1/0481/7793/8583/files/grand_l._bush_instagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2857/4119/files/29709311021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9632/9377/files/zone_de_tlchargement_site_officiel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f66fe1-7e5e-451b-ba34-9eb516f1abb0/59334581907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2939a1-0ae6-4d08-9d73-68f94badc7bf/26950488910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03aecd12-eb20-420c-9501-e56005eabb66/ginajizoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d5771b-3c12-4b93-9bb9-b9fbad651d88/19289740639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35ffcc6-eb91-4930-9ba0-76ffa9cc00a8/64236854387.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_off00005dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD5 5084 bytes
SHA-256: 1a5fb31babcba12ed114dc41c26fba20856b207efe58f9a08a270a1e87ba9652
font_01_sfnt_off00006f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F57 10060 bytes
SHA-256: d516da5276cace4f6a261846074aababcf0565874b65137fb6e1c28a39342b76

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