Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe9ee3f20238d83…

MALICIOUS

PDF

43.7 KB Created: 2020-11-09 17:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 24bd0bf741c07689639ddae4df7c3b4b SHA-1: 19ef91d82688ad9d336a70dc8638734a14bdab75 SHA-256: abe9ee3f20238d834d96f49b0f8b166c37f8ade6ba42574e43c908795775f6b6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/123?keyword=sands+of+the+coliseum+4 PDF link annotation
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/1815943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f8fcb0b695a8.pdfIn PDF document text
    • https://nofakefol.weebly.com/uploads/1/3/4/3/134341926/7aef7adf2951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_5fa6256b20010.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/complete_guide_to_carb_counting.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/demugowitesatagegadir.pdfIn PDF document text
    • https://s3.amazonaws.com/juzalizuvar/red_persimmon_nails_las_vegas.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/purple_duvet_cover_ikea.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/delubigo.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/65191133426.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/54048996715.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/cours_excel_2007_niveau_1.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0A 3016 bytes
SHA-256: 9e649ba6ed8fd7abe94d3366e74877012d930783cc9f91f97fa1c21cd5a54637
font_01_sfnt_off000054d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D0 5356 bytes
SHA-256: 081a530932a21f22d6b0c29068b33c91dbcd340395ddfc5d740eb05ac5e6119b
font_02_sfnt_off000066e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E0 8136 bytes
SHA-256: 11bfbcac01ac2f234db6b9412363411926fafc44e4e06cc1bfe004b3efdcc7a1
font_03_sfnt_off00007d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D75 10420 bytes
SHA-256: 2c59c14c809f48660d0a2d68844becddbdc3eaf7fc883865e3bf359157bf6d9c