Malicious PDF — malware analysis report

Static analysis result for SHA-256 6696b3b0c6ea6e0a…

MALICIOUS

PDF

68.7 KB Created: 2020-10-03 09:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5da07eba6a881d7c5a5e3cbb5b4f509f SHA-1: d76efae5eaca29156a264fb6186ab6d32665567d SHA-256: 6696b3b0c6ea6e0a98778e6c077d3eccdd9adb30352af0f3daded2db07a4875e
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?keyword=%25D8%25AF%25D9%2588%25D8%25B1%25D8%25A9+%25D8%25AD%25D9%258A%25D8%25A7%25D8%25A9+%25D8%25A7%25D9%2584%25D8%25AE%25D8%25AF%25D9%2585%25D8%25A9 In PDF document text
    • https://site-1036864.mozfiles.com/files/1036864/gaxudawujunolop.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/xigujetunugefobavoz.pdfIn PDF document text
    • https://site-1037120.mozfiles.com/files/1037120/9579624266.pdfIn PDF document text
    • http://vexag.catcollaborative.com/uploads/1/3/1/4/131406840/5546729.pdfIn PDF document text
    • https://site-1036652.mozfiles.com/files/1036652/fasinutadajisewitadadil.pdfIn PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/70732043926.pdfIn PDF document text
    • http://files.caloushop.com/uploads/1/3/1/0/131071137/pimagiw.pdfIn PDF document text
    • http://files.mammysplace.ca/uploads/1/3/2/6/132681303/8932625.pdfIn PDF document text
    • http://vokozoxoz.bldrwindowtint.com/uploads/1/3/2/6/132680874/0dc99dce597a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000cc28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCC28 32356 bytes
SHA-256: cfadf785faa5b285e73c1a3f40a77acf5089f92996167e2c26ff8a23425eeb76
font_00_sfnt_off000086ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CE 4068 bytes
SHA-256: d7e4fcd85c2a14407505151ebf912dbf70fd6350b25201be6f965661cc4af977
font_01_sfnt_off000094ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94AB 8596 bytes
SHA-256: 9112801557f59b3334126f9f34fbc8ccec04da9227ecaa8ea21f9b98b60c9e94
font_02_sfnt_off0000b244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB244 17456 bytes
SHA-256: f787b90acff6e81a9374a66f34e776f1bdc0517f2a3e5bea62533af84032e9c5