Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80564bcfe225cac…

MALICIOUS

PDF

50.7 KB Created: 2020-10-12 13:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4afca8036f34703e01e2da929d034a72 SHA-1: a86e92879e9353a0236b9804693e68247fe3a117 SHA-256: c80564bcfe225cace963c0d2ad923e3363b8675958a41379f87a500b213e5097
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains a reference to the malicious URL. This suggests the primary purpose is to redirect the user to malicious websites, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of dynamic behaviors.

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.
  • 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://cctraff.ru/strik?keyword=winning+eleven+2020+android+warkop In PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/musidavafuwelavuwak.pdfIn PDF document text
    • https://site-1041485.mozfiles.com/files/1041485/bujekawadifisonulezi.pdfIn PDF document text
    • https://site-1042448.mozfiles.com/files/1042448/mepasokelapu.pdfIn PDF document text
    • https://site-1043400.mozfiles.com/files/1043400/fesuzarowukosu.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/69786021699.pdfIn PDF document text
    • https://site-1042888.mozfiles.com/files/1042888/vileniwafumegiwumova.pdfIn PDF document text
    • http://bovoxof.olasazulescostarica.com/uploads/1/3/1/4/131406453/8da18c.pdfIn PDF document text
    • http://wipizaz.wistormeliteallstars.net/uploads/1/3/1/0/131070080/65df462d4d6c3.pdfIn PDF document text
    • https://site-1038999.mozfiles.com/files/1038999/76255173066.pdfIn PDF document text
    • https://site-1042104.mozfiles.com/files/1042104/sevemo.pdfIn PDF document text
    • https://site-1038604.mozfiles.com/files/1038604/mijudolegozolunivanedo.pdfIn PDF document text
    • https://site-1042359.mozfiles.com/files/1042359/1138677018.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/bomizasipumezuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 5160 bytes
SHA-256: 7c8f52e1e34ded9dcb04c55523f94c760b222b41894bbf06500530504ce21ef2
font_01_sfnt_off00007324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7324 9952 bytes
SHA-256: 45865a6e7cfec6478a5a809cc94313569f84d480e1dc4057dd703cce9c693ee4
font_02_sfnt_off00009527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9527 17600 bytes
SHA-256: 0f86de1b8eb84cd8d36450257b835c403795bebe8f0ca050f4148780f1a9a479
font_03_sfnt_off0000afae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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