Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f736dc524ec61a…

MALICIOUS

PDF

44.8 KB Created: 2020-10-30 22:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e92d92b09ae9d847931702e1acb14c8d SHA-1: 90be3ecce970204385dd4f0aea1671f44798e0f1 SHA-256: 27f736dc524ec61ab6d5f6c6fa83b5d1e5addd306a2ccfaa5ac1d5471bb5961b
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=nys+civil+service+police+exam+study+guides In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412763/normal_5f9966a92198b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379236/normal_5f960ed15c2be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f942baf88efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f99d71368509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f8e11ef26cd6.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/lebupiduwi-vivifagisefiveb-bivuzewa-tekab.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/1/0481/8442/6663/files/12714484651.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/sulibegukaboj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8155/3814/files/revenge_of_the_dreamers_3_zip_download_vk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bcc7324-9a90-421e-80a8-07f3cf9d6650/17829641757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2808/4896/files/vejaximibaber.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/mechanism_of_action_of_antipsychotic_drugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8967/2356/files/2148721146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9440/4008/files/rudiwizizopimiso.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_off00006e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E42 5592 bytes
SHA-256: 7cb1294b92f612896f1c54ca0dd7bf2bc681ce459e4d27dd6637dc30a2f073bc
font_01_sfnt_off0000814a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814A 11112 bytes
SHA-256: b2f6dbbf7b7286a5bc50dc49e077e7bded51d75514e09ef5dd2544b18d046315