Malicious PDF — malware analysis report

Static analysis result for SHA-256 a110b67507087c41…

MALICIOUS

PDF

39.5 KB Created: 2020-09-30 06:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f4792152e0a871c2f45505eb5da4b1d7 SHA-1: d36528de637041b2247bd91e84a34362ff2e97a6 SHA-256: a110b67507087c4163d6b567b3052fe0bb8aa5345a8ee46724ed56e402c69230
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://ggtraff.ru/strik?keyword=dog+anatomy+bones+pdf In PDF document text
    • http://files.journeyagtorrington.com/uploads/1/3/0/7/130775752/24d3d978f375cf.pdfIn PDF document text
    • http://files.sdmny.org/uploads/1/3/1/1/131163669/kajedogobixikadaxago.pdfIn PDF document text
    • http://bupol.healingpathmn.com/uploads/1/3/1/0/131070301/96fe770df.pdfIn PDF document text
    • http://vokuvuba.johnsonhoopbuildings.com/uploads/1/3/1/3/131379741/8651729.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/52209859289.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/59c1bbfa-02cd-491d-96f4-742fcc43a514/73480188835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/250a480a-8a34-4c1b-90ac-3ed80962893d/nesawazivux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649d22cc-7fa1-4e55-ac3c-21e82245aa1b/70045830662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e16a568f-79b9-4f60-aacc-ce0d5a71d7bb/fisizabepifowalozaniteg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee8c869-c572-4658-baf8-a4b51a44dfa1/wagoku.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_off00005e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7B 5472 bytes
SHA-256: 578519c44761773d3c5e59c923a7021361f89c19187c99df4533edf992a6adcd
font_01_sfnt_off0000711d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711D 9720 bytes
SHA-256: 550b03bb2ed20e9d56fafb9b88c98acb517d3f8253c5a52fe6506bee78da1e41