Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3a71628a987c49…

MALICIOUS

PDF

40.4 KB Created: 2020-11-08 15:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 6d10e01052866e819d2f76ff83b946e0 SHA-1: a53d71273eaf1f7f66c07690a62d8146c737c43c SHA-256: 4f3a71628a987c49993287c8e25f9bdccc6c66075b40ce8f67cac5a011fdfbe5
132 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?keyword=tunein+apk+download In PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/3521954.pdfIn PDF document text
    • https://sefusozikoju.weebly.com/uploads/1/3/4/3/134366316/19a6a56fcf5cfc7.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/603474.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kagovonokud.files.wordpress.com/2020/11/dekazuxomizugufowedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a4a6e04-083f-46c7-a4f4-1c20467315da/47421544873.pdfIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.pdfIn PDF document text
    • https://mipibona.files.wordpress.com/2020/11/22678977823.pdfIn PDF document text
    • https://tefijum.files.wordpress.com/2020/11/floorplan_pro_serial_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515dae9b-d142-4427-a658-b75651336768/38089529060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc43b0f2-dd30-427e-ae9f-ce3fcc0225cc/68989559803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437ba985-f4da-41ef-afec-e91b73cf8a96/munozujebetolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced197b2-568f-468f-988a-6021411bdc8a/58282767703.pdfIn PDF document text
    • https://megisimunom.files.wordpress.com/2020/11/33069271846.pdfIn PDF document text
    • https://zinamoviro.files.wordpress.com/2020/11/jonopagiguwizar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9499a630-2010-4578-9708-d266dd456f64/math_formulas_for_florida_real_estate_exam.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_off00006038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6038 4784 bytes
SHA-256: c88414488e9bd09a119c5dcedc2f64087f6f80b29b8db288b8e59bdd16c17bce
font_01_sfnt_off000070a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A5 10728 bytes
SHA-256: c8d8b639afbd2b1af3308b91b6d2635669543df122c7628520aad74064022cc8

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