Malicious PDF — malware analysis report

Static analysis result for SHA-256 650988513680c05d…

MALICIOUS

PDF

40.8 KB Created: 2020-10-29 02:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: bf9915dce3a58c1a1044f3a53a5c1348 SHA-1: a6ed6e9ea41bf0fac3711d358f13b59e304c72cb SHA-256: 650988513680c05d78c00b9e5362f8652cd2cc0c33f379a84f5d701cfaa752bd
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=fedders+portable+air+conditioner+replacement+parts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5f98652b6ff3c.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/cfc646e583a11.pdfIn PDF document text
    • https://donibirumot.weebly.com/uploads/1/3/4/4/134463545/6481954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5f8d2bd2a5f47.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/3754839.pdfIn PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/2cc15e0573.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/73bd344e-e888-44e8-89b1-0f6c6de2db4f/73514114533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509a5b83-fb7a-4ba0-b1ad-f73ec69231ca/12008749107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8309/6775/files/asus_battery_replacement_cost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3614/9413/files/vafove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0487/6727/files/calc_3_final_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5678d47-72d9-443d-a015-8f48a6b7fdd2/12882315510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/shamanic_animal_spirit_guides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1042/0646/files/65135995235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/627e112f-9584-4439-a7eb-f179414472d4/27574606899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1737805-7465-4e7d-a65a-7d0c4f7e12de/gamixeburo.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_off0000601c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601C 5312 bytes
SHA-256: 40be1a375cd5e52c6e6889f05ebdfec384e38640689e95a557b195cf1a717fb5
font_01_sfnt_off0000720e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720E 10604 bytes
SHA-256: d1e4ca54bd9bbb476ae0df096a58a988603a6b154c3119a33b63484a2b5e321c