Malicious PDF — malware analysis report

Static analysis result for SHA-256 99dabe34ae94bf64…

MALICIOUS

PDF

48.7 KB Created: 2020-11-07 20:59:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6ad777e18679005145fb4f42eead41c2 SHA-1: 0f9ad170aa4febcd537e8a465518a674fbf8d1fa SHA-256: 99dabe34ae94bf64e048b79d1b897c7e0732e73435ce42742515407ba3d40a31
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?keyword=antenna+tv+apps In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446017/normal_5f9d3e3c6fb32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5f9019b26ace4.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/jewizopukuni/lidowugoxawobosamuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69208db-b332-43d9-9083-528f9dcb6c4f/kiziwojura.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/sapiens_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/porter_cable_pocket_hole_jig_menards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2187498-f78e-4839-8973-32e99bbee83a/libros_sobre_esquizofrenia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9a5eee-006b-4791-8251-75ceb997b387/tedera.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/90564872829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23eac33f-05c0-4f1e-baa6-4da4148e189b/salexifanusulalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10bd6683-eb92-4ca7-b125-18b2f645183e/zagut.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/sotafi.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_off00008204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8204 4736 bytes
SHA-256: 8d0dbd622f391335bbe6d3e4748cafe63e5e57797b42b8ee81b6d5064b266c4d
font_01_sfnt_off00009238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9238 10648 bytes
SHA-256: aec34ca002b69f0c438f94685bbce76c343828ac0315a75f753934ea68b9510b