Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a70a57eed704c25…

MALICIOUS

PDF

42.7 KB Created: 2020-10-14 17:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a60380fd5e39d19a90022e4c467a97c0 SHA-1: 904596e5ad580e566e3a1d6a4e73a4413fe39076 SHA-256: 7a70a57eed704c258a2b99e66b3bd14b58c412ef020d52e76597e5811fc7589c
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/pify?keyword=manual+muscle+testing+ebook In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f86fe937c581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f86faa7f1124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f86febc12787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87026dba6c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f870519b7469.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/9594994.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/4102594.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f8703ed89506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f87019214543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f86f9d29deb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f87023c0d076.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/b5dc306d-47a7-4c2c-98a1-a2fb318f9f3f/vuvat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b1d6f8-0763-4e14-9a6e-7d0185044d2e/3124382158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feab1759-21e2-4080-8a13-2089ac5990ae/34997221508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d32898-480d-405d-bdd5-453a62dd967c/fixososegafuwopobuviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba3c6ec-9de1-4381-8846-29da78a8f779/39212012279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c673ea-599f-4ceb-a7ab-ff1234f592ee/77513542904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c29ecb-0b02-48d6-bff0-9f664a4556c9/kojupiwitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c898b841-f1ea-4e47-93bf-99c7d93e5570/xiset.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_off000068e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E5 5232 bytes
SHA-256: 1c86ae81dbbcbc97707452cea6dfba47667b5ffd651f4d8a327edb3fc762ef95
font_01_sfnt_off00007aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA2 10272 bytes
SHA-256: 97f40805c6b3be4384c4b92df0d493c5943072d29f000cc4ecc15101d11a7e13