Malicious PDF — malware analysis report

Static analysis result for SHA-256 829e7d5745c39664…

MALICIOUS

PDF

41.6 KB Created: 2020-11-07 00:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8863acfa1c2ab4515b8e22f195df8485 SHA-1: 63ada728716623a0416a5805007e482fbab6cf02 SHA-256: 829e7d5745c39664c7d3670e38d4d946b989e3ed0d250f5c6f6df84ef7f6f8b8
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://trafffe.ru/aws?keyword=skills+practice+answer+key PDF link annotation
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/luxezojigevalip.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/bawalidamovidud/71143345872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b233c268-d8eb-4f1e-b18a-75f269d0b56e/41791007841.pdfIn PDF document text
    • https://watupep.files.wordpress.com/2020/11/pekekudoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3eace97-1bbe-4935-b48e-8a85ced4d47f/visual_guide_swing_components.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee893114-c0d6-4462-99ee-7eb7e0443c4f/74155364748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58789d25-e9e6-4e00-af36-3af01f916ea9/93958256737.pdfIn PDF document text
    • https://guwenazepaxu.files.wordpress.com/2020/11/vonopit.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/70794550591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9566531a-4dc7-423c-81d7-90d71b6ae95d/latex_system_of_equations_right_brace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16aff178-6e4b-4eb2-b1b1-4c2a18c44d23/rojatabojobowanokib.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_off0000649d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649D 5288 bytes
SHA-256: 47d274d1c1105b399c08bb9cb873d78ce13402fbbba8d1447a72fd014c275294
font_01_sfnt_off000076c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C2 10380 bytes
SHA-256: 7d31b270a99c3c7c3c2b8ad54700b7029dce6b33e8cd76ce3bf4c02ff68034bb