Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eaded48a3bae5d2…

MALICIOUS

PDF

74.1 KB Created: 2021-02-15 07:31:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 503b6cb832867b3d8d9e6a49d3807c82 SHA-1: 8a7e9dbc44975333811ddae62eb9326e716a6435 SHA-256: 9eaded48a3bae5d20239332106d0e14dbc95475d04b5b196e41898f8c9f58970
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a likely attempt at phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/123?utm_term=anti+bullying+quotes+tagalog PDF link annotation
    • http://wisecredit.info/12420492870bvm6r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_6016155dec173.pdfIn PDF document text
    • https://fotavimapuwe.weebly.com/uploads/1/3/2/8/132816041/sererulosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426972/normal_601973b1e07f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367301/normal_5ff5b5e5e5d31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385648/normal_5ff3f591df7f8.pdfIn PDF document text
    • http://busurman.space/guide_ne_demek_trkedebj5bv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_5fda78399fd8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382193/normal_6014ec345613a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470977/normal_5ff146695afd0.pdfIn PDF document text
    • https://nozabuzewetuk.weebly.com/uploads/1/3/2/6/132683147/jepodoledezopepiripo.pdfIn PDF document text
    • http://fresh-ita.space/idle_ants_hacked_apk_downloadqqxyq.pdfIn PDF document text
    • http://halfraire.xyz/8._snf_sosyal_bilgiler_testeqx66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467564/normal_60232bab8b3b4.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE381 5112 bytes
SHA-256: 11d591f3d2e90634f7a440a0280cef8b4bc843214b5c062dfbc941b7179533a2
font_01_sfnt_off0000f506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 11428 bytes
SHA-256: 8a867106257458554f5e069b71904dd2c4e6d12acaf9314093da4623918935e4

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