Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c4f69be6a0966c…

MALICIOUS

PDF

39.1 KB Created: 2020-11-06 21:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 36af3fc23aeb9a44b994d9adacca8afa SHA-1: 1b7c748f92e03e4c2e4de572a689e901ef32769a SHA-256: 86c4f69be6a0966c5b7470e6062345b68bdb3e3a6971d74a75c093c4bc9dd5bf
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/aws?keyword=grow+empire+rome+gems In PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/09a65df7f3e.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/sakoba.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/b9e2994eb7de5f6.pdfIn PDF document text
    • https://guserokofetaw.weebly.com/uploads/1/3/4/3/134341966/0ed61d45.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/8731345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410194/normal_5f99a19d78fb1.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/veloledi.pdfIn PDF document text
    • https://junovolosexev.weebly.com/uploads/1/3/4/4/134467690/5052774.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/1640064.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/cd96bcd2-16e8-4aab-b2d2-88de92b986c8/graveyard_keeper_zombie_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0acdadf1-1754-45a0-9d35-1c1615a2ef0b/zeneg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921ac7a8-5de8-4f00-871a-c726fb070fae/5898616473.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_off00004797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4797 5020 bytes
SHA-256: 827ff16a026184958f5d1bfb2924b9e957ea6f74380ba67f8c318eeaba1312a7
font_01_sfnt_off000058b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58B7 9804 bytes
SHA-256: 74bd6569e9cca86072a3ed90dfbb0ba6e5ef5022cd2f1127e244c91b67192c94
font_02_sfnt_off00007a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7A 16160 bytes
SHA-256: 9ffc405fbed68b1ed35cf25504b2a045b5802e2074cf99e6920a228075e829fc

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