Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd8f142f36212eb…

MALICIOUS

PDF

69.4 KB Created: 2021-01-28 14:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 369e00c01dcace2a6925ac944ac80bb8 SHA-1: b9354c4733f4f7a5854d67e9ffcf84b852ab478b SHA-256: fdd8f142f36212ebd8ce4b2fd5d7f983067b402fbadfc5b257b5b6897c765753
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/aws?utm_term=badshah+movie+ajay+devgan PDF link annotation
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/6ce152c6b2b6e.pdfIn PDF document text
    • https://cdn.sqhk.co/xinovupu/2QheRhe/vector_subtraction_calculator_physics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_601112796e4ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496592/normal_5ffe55cc8c56d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5fe95e9ed6129.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/xojafemori/35788997437.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/56132397364.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/34877634571.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/milwaukee_voltage_detector_2202-_20_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/55579581287.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/repovezobuj.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/76601986591.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/varices_esofagicas_tratamiento_nutricional.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/97728151216.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/peter_rabbit_songs.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_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 5396 bytes
SHA-256: ef6dc0c188fba9f123d4a8a05040f4a389f45330c6595153bbd2fe3efb2b813d
font_01_sfnt_off0000e4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C1 10696 bytes
SHA-256: 0a46b5b8e4085250ad5db98f1523b9346b9cc2108a1d8d287ff2b402a73db8b4