Malicious PDF — malware analysis report

Static analysis result for SHA-256 accd73c32b9adb6c…

MALICIOUS

PDF

44.4 KB Created: 2020-10-12 06:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1f595be16bc26b46c7c446c9766a5c79 SHA-1: 3208c7317d448c89301794355b85c4449fea8e7f SHA-256: accd73c32b9adb6c40bdc7496fba62dd377922493b5af10c61f02d1a90f37724
124 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.
  • 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=wcco+weather+app+download In PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/tezinuzovixezofaseso.pdfIn PDF document text
    • https://site-1037902.mozfiles.com/files/1037902/lawigibosanefubisenik.pdfIn PDF document text
    • https://site-1044109.mozfiles.com/files/1044109/xadipodaropurewol.pdfIn PDF document text
    • http://files.eaglebrooks.com/uploads/1/3/1/4/131454304/kapokipemukuraw.pdfIn PDF document text
    • http://files.lesleygarratt.com/uploads/1/3/0/8/130874517/b959b.pdfIn PDF document text
    • https://site-1038948.mozfiles.com/files/1038948/55266677919.pdfIn PDF document text
    • https://site-1040218.mozfiles.com/files/1040218/sawapibezoj.pdfIn PDF document text
    • https://site-1042100.mozfiles.com/files/1042100/24943109459.pdfIn PDF document text
    • https://site-1042976.mozfiles.com/files/1042976/45993197150.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
    • https://cdn.shopify.com/s/files/1/0482/9963/8945/files/iron_jawed_angels_active_viewing_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5338/3581/files/foldable_pool_table_8ft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7670/5690/files/19991864083.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
    • 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_off00004f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2A 4828 bytes
SHA-256: 6781f1b6a81ddae358591136c25b5856a623c95a537662a527a95e73fe49eca5
font_01_sfnt_off00005f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 9716 bytes
SHA-256: 9fe31386a53868d943db05a934665c4498bc49e4a52c4fa69e3e3b9b269f26d1
font_02_sfnt_off00008104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8104 16380 bytes
SHA-256: 2e1dcfa215ff7068e156f9bca6f25e666cb310e753e20272ef9c89573ef626fa
font_03_sfnt_off000096b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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