Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b74abb528a8f44b…

MALICIOUS

PDF

45.3 KB Created: 2020-11-09 09:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c4b0cdf11d4948e3dff2762a7f50f0e6 SHA-1: 901702acb49b377178dc4337c9df2ef5dec0cd24 SHA-256: 5b74abb528a8f44b43029e542d118a196f943bc7d6a4e7ffcdb6ad5d61b1a184
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=words+starting+with+alphabets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415304/normal_5fa44ac6983db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410962/normal_5fa8449e0866d.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/wukevirenesu/jordana_brewster_on_dallas.pdfIn PDF document text
    • https://lajoluxozuf.files.wordpress.com/2020/11/12538453617.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/81955240954.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/55818217567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd42a464-6b1a-403e-8939-36bfa4e13045/fezizobuwokimetileze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d6fe9b-f77e-4815-a50b-393b53eaac14/96494711411.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/the_masked_empire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d318cb1-a80f-4246-a024-8e6112b18c21/77770397853.pdfIn PDF document text
    • https://lodazogazitu.files.wordpress.com/2020/11/18582996233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc48034-5518-49e2-bdfe-2a99c1dde7d1/carrier_thermostat_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec33a76f-268b-43c9-bd7f-ceaceff6782b/art_of_storytelling.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_off00006f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F78 5468 bytes
SHA-256: c6ec6099fdb0c058b73df3f9f82661a1128875dab5fc16ab9a3374bfc1cdcc4c
font_01_sfnt_off0000821a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821A 11420 bytes
SHA-256: 0245c4404bff2eabe218be2d315e4be62f2326ca1ba57e76904442d7d4bc4516