Malicious PDF — malware analysis report

Static analysis result for SHA-256 4beb4c25651971b1…

MALICIOUS

PDF

59.3 KB Created: 2020-10-15 16:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 47388c7b929f13137a3743c36185bf7c SHA-1: ee841b35cc5597defafd03d4cd6e6ada2bcb3bac SHA-256: 4beb4c25651971b1cbd6016f6513695490eb6ae2986af7b23807c4fca7334c0f
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://ggtraff.ru/strik?keyword=martian+notifier+watch+manual In PDF document text
    • https://site-1043471.mozfiles.com/files/1043471/58765016254.pdfIn PDF document text
    • https://site-1039610.mozfiles.com/files/1039610/bomibejapixalovojim.pdfIn PDF document text
    • https://site-1039864.mozfiles.com/files/1039864/33927820313.pdfIn PDF document text
    • https://site-1040771.mozfiles.com/files/1040771/dafeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f871ad0ef28d.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/rupasijaje.pdfIn PDF document text
    • https://site-1040504.mozfiles.com/files/1040504/45646368986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f878295e5ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f87274584495.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/bijafixurumib_memusironitajus_jabisolafu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nimemoroligamaj-tafixidupara.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fibaxizimudez.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/2c9b658feef3.pdfIn PDF document text
    • https://site-1042497.mozfiles.com/files/1042497/givol.pdfIn PDF document text
    • https://site-1039002.mozfiles.com/files/1039002/zotipodifaxagifibu.pdfIn PDF document text
    • https://site-1038835.mozfiles.com/files/1038835/loninoj.pdfIn PDF document text
    • https://site-1042107.mozfiles.com/files/1042107/37407083999.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00008b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B82 5040 bytes
SHA-256: c39f4bf2705785b6993a52bd74949bdd9b2ecb6de6f08029c34ca031d1edf2a7
font_01_sfnt_off00009c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8F 2116 bytes
SHA-256: 316f78c6e162999e43ccb83d429ef85c46045bf1ac59c77d169faf589ecd4eba
font_02_sfnt_off0000a639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA639 10440 bytes
SHA-256: 578af15499d1c4705abfa76019b80e56d3c403d259eb7db4f55bb0c181007bec
font_03_sfnt_off0000ca09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA09 16100 bytes
SHA-256: e3f95e1e5eed5635da6a1ee467d11e798bff995adb2e735a7db61c472c9085a3

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