Malicious PDF — malware analysis report

Static analysis result for SHA-256 8390656996aa6540…

MALICIOUS

PDF

39.0 KB Created: 2020-10-31 02:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 93f0c4fe82b64235f3688cc9655069ae SHA-1: 5f2dd5753079e5330e99e37ee7c38ee18f59d9a0 SHA-256: 8390656996aa65401fd0e75b6fedf591fbc3dae2ccc0470fcc7a73db81d8c4b6
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://cctraff.ru/pify?keyword=final+fantasy+tactics+guide+pdf In PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/kazuzuwusuj.pdfIn PDF document text
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/6c160a4d07c4ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_5f9b78e41b4cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/kemoponimajimi.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/vozexejabozefowaxeledorax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb42bb6-a09c-4943-87f2-91efcf337955/pozevizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/bloodborne_cainhurst_castle_boss_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/repudonakenufimilesu.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/24499656536.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/affairscloud_computer_capsule.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/mathematics_for_economists_carl_p._simon_lawrence_e._blume.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/noncompliance_related_to_medication_care_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8256e1c-5954-45ab-b52f-cfa1a165cf06/37302929613.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/ncert_maths_book_class_5_solutions_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/nodosijodokipuvodurabefor.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/31090655128.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_off0000591f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 5284 bytes
SHA-256: 464e9a83e0c11de9021912e10738b35135a84d4953533b65342be96fd19e8bde
font_01_sfnt_off00006b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B44 10576 bytes
SHA-256: b7561d14bf22bb5f68660203f25b9d94406d48caa67cd678ed665236b58eaead

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