Malicious PDF — malware analysis report

Static analysis result for SHA-256 779bad6ef859f088…

MALICIOUS

PDF

44.0 KB Created: 2020-10-18 13:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 84f86a296d2f57994907a49ca72c5978 SHA-1: 6a10ed94427105c613001d06bb898775c8659246 SHA-256: 779bad6ef859f088fca58028ca6894ee49c1ceb5b19d2705060a6cd7fa3a33f2
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/123?keyword=que+es+comercio+exterior+pdf In PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/9232432.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/lunetepoxuvedupupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f8bb4100301c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f89aa3ac4a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5f8a1de7baf5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f89af144a296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f87633996394.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/cf7f36a9-44db-480b-a2ff-30dc873376dd/zubutofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3477fe8c-69b1-4979-840d-37524a3eb962/electro_voice_630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfd8223-30a7-47c9-b368-3925f553ac5e/miwirugupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51ca38f-2861-42bf-ac94-facfc691002e/bepokutikowopupekumux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117feb0f-50ea-4faa-993f-ba4ddce2447c/gaxodumiwajajalepumuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef932e5-8e41-4f4e-a091-a3c51128b068/filiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5360d60b-e501-4871-8767-eeb29260e66f/39291864777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac22b71-ed9e-4983-97c0-72db49e9fb69/jenny_star_teen_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d91dfd-5b8c-475d-a499-77a8544527e0/yakuza_0_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d0730c6-65c6-4b5c-b3f8-0cad32266e84/vozaralikudoviziwidinoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/647886e9-fa87-43b0-9aae-2cff5ed327b2/begosurul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e526f6d8-7ff0-4e5d-91d7-bd7cbe56c3d2/78695540380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a4ca684-b6b1-4735-9c99-53175586afd7/ramosasaxajezivogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0125/2510/files/4043659402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/3685/2391/files/jupewunete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/gujimexinaxibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3637/7756/files/ibm_institute_for_business_value_digital_transformation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7025/5004/files/kejamagijogonaguw.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_off00006c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C56 5188 bytes
SHA-256: 6ca90414f3e758f767f22241e8e7fc8c813f7c5b4b92c0db4ed0d1fd5e521b64
font_01_sfnt_off00007df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF0 10780 bytes
SHA-256: 0f0a29380048b1206b2597b7b8050f7fd37f61239616acece3102b61c3a970fe