Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc4a95853dbcad3…

MALICIOUS

PDF

44.4 KB Created: 2020-10-05 06:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: eaf0e30f7c7d35edd0f86a577676744f SHA-1: 7f2c1d5231b023bbf4907e93c5d554d05f637b0b SHA-256: afc4a95853dbcad362ce8875215d6b0ae0111d5ff991d01b14187986afe40cc8
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/pify?keyword=a+painted+house+chapter+summaries In PDF document text
    • http://files.jillhakala.com/uploads/1/3/0/7/130740128/8e8e25e.pdfIn PDF document text
    • http://zosoxezo.bostonterriersnyc.com/uploads/1/3/1/4/131453918/dowemawapadupug.pdfIn PDF document text
    • http://xuzal.notbysight.shop/uploads/1/3/2/8/132814900/nedoz.pdfIn PDF document text
    • http://files.thecrossingresort.com/uploads/1/3/0/8/130874314/cec94d1435.pdfIn PDF document text
    • http://senox.kodleague.com/uploads/1/3/1/4/131482812/9602015.pdfIn PDF document text
    • http://gemigil.bigtrecreation.com/uploads/1/3/1/4/131406535/napuxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5759/7595/files/womens_dumbbell_workout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9355/1013/files/35309436279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2664/4119/files/62088746526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72216203-ba6f-44b2-be8e-b358829463eb/26401529430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2600e3a0-1b8d-4a43-8328-2981e13f2ee7/tawufunamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1214c650-8974-47a8-994d-ac56caf5028f/nuvotewetepa.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_off00007133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7133 5272 bytes
SHA-256: 8655fc707e4d26c63a239698748fb2477f78a154ddf69847b11b36c04e68db14
font_01_sfnt_off000082f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F1 9952 bytes
SHA-256: b9b8d2277da4dcc1aaa4c69e028b33a7d86dc8b022a74d22a9349e00dbe1f13e