Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4b121af8b172d4…

MALICIOUS

PDF

54.4 KB Created: 2020-11-06 22:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 0843e5550c027779627b7ea6b05993d5 SHA-1: 90b07db0f9f24c93aac0de15c3bcd49d26082844 SHA-256: 1c4b121af8b172d414bc504b33a1e52c4fc8b65ef00bbcebd4d910035e2b584c
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=joker+full+movie+free+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f8a2424e7098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_5fa5a21be325d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8abe12936bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c25576d8-fb31-4b5e-b746-7c3ac9a9e586/vaxipoziposafuvena.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/headway_beginner_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56e6a01-a0f0-4ea3-85d5-72d13a3015d9/85998595963.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/58452767918.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/mtbe_boiling_point_under_vacuum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16fed707-ff15-4021-8c55-e12ef12365c3/32615126926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0078f14c-20dd-42c5-874b-6b2c27a91715/zujagajotaju.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/37008614315.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/nuwopi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 12184 bytes
SHA-256: 49808b0e4f9f2cfe7f404e2af127dbd1e1098b65db2f7d02efa3e71258d4d24e
font_01_sfnt_off00008b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B62 4440 bytes
SHA-256: 23046010c7472547adb440653c993afeb025f050d0a844d28d6933244a52b0af
font_02_sfnt_off00009a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A63 10592 bytes
SHA-256: 5165ea5c169a7ddc093195bf63b263dd90b7b7d3e49b9967f43d8ae13029ec72
font_03_sfnt_off0000be5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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