Malicious PDF — malware analysis report

Static analysis result for SHA-256 764b60f3696bf521…

MALICIOUS

PDF

47.7 KB Created: 2020-10-05 23:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 10bef002f676ad62361c96f43a32f7db SHA-1: e110d2bd1d2e053843c84dae9cb65052080c9db4 SHA-256: 764b60f3696bf5214e34ffd2a4eb785a1e2250e3ac48127f9d31734c230a2bb9
184 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=warship+battle+unlimited+gold+apk In PDF document text
    • https://site-1038597.mozfiles.com/files/1038597/netureradiz.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/vuwuwowumuwimupesalusimew.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/jusesuveju.pdfIn PDF document text
    • https://site-1039285.mozfiles.com/files/1039285/79362232160.pdfIn PDF document text
    • https://site-1039800.mozfiles.com/files/1039800/xumeke.pdfIn PDF document text
    • http://files.christinelizotte.com/uploads/1/3/2/6/132695865/beravebogej.pdfIn PDF document text
    • http://kunupunus.rescuedfirewood.com/uploads/1/3/1/3/131383541/3829052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfca08c4-596f-419e-8073-72aeb06d7715/88584093226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d6a583-42df-4c03-8f6d-8296f57585ef/28600331310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8d17e3-589d-49cf-8e9d-8515444abc1d/645654334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63084546-eeb1-4b2e-8c47-416d85b2ab74/mimexovuzaromumixedovul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6365/4040/files/99194804799.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000661d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661D 5588 bytes
SHA-256: ed1051e67725cc53a32060383942799471f66f45f04fee217f394b487d345e46
font_01_sfnt_off000078fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78FA 10260 bytes
SHA-256: ca02f49e8605f566d1aa04ff7499b500f9173c62e506a9fda5cc03ecf1a29ecf
font_02_sfnt_off00009c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C5A 16160 bytes
SHA-256: 49898e49e877ec90855fa0b20ec776352fbbc9c6da67f9354d1218dc46407470

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