Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5431adf4b112d6…

MALICIOUS

PDF

42.6 KB Created: 2020-11-07 17:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ec2571c3b7ca0c1ed13926dddaffa9c3 SHA-1: 5c53bebd16e191a737393c4a1a285dfb12312363 SHA-256: ae5431adf4b112d621268a240c021f935259d14a26c7002a9a8feb8ed3a80a5a
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://traffset.ru/aws?keyword=unblocked+games+66+at+school+ragdoll+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421039/normal_5f98de0d1ed8c.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/55c04867-b5cb-4afb-a324-ea4a790de8c5/97388097102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d81584-9306-4ddf-9771-cd174fe54a14/bividasutozobefuga.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/dofexaloxifosovajunegag.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/curiosity_quotient.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/933bbb37-85ed-4239-ba77-e6fdcb7d18bb/tupiwutuliwivejufosijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b0c5867-1831-49f4-bca1-516685a0df94/the_automatic_millionaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b240b33-b149-4107-99d7-d13cf8fa2029/21972118347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca347b9-6908-4f1d-acef-aa7c89600c3f/69625946426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb86a0c-7892-4b33-9300-6401a1381f8c/80232288126.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A91 5440 bytes
SHA-256: 778208c95483f2995a9799db7c278544236f2c4c222c6096f6211fa02e561f00
font_01_sfnt_off00006cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDE 10140 bytes
SHA-256: 90a85a75ed883757a91b7c16b11a9e06c8d7ca137c41f0c5d7c91259dd89f7ae
font_02_sfnt_off00008f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f