Malicious PDF — malware analysis report

Static analysis result for SHA-256 38576d48583552b2…

MALICIOUS

PDF

79.9 KB Created: 2021-03-30 03:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 38f32284d636ded7881b8f20131f0efe SHA-1: 751440c88b7bdee0a023d3cba042793ecd2de13c SHA-256: 38576d48583552b2071ed47fb0e792409d964814ff0f638d16beb4cec3fabe5d
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting and are likely part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ponafet.ru/wix?keyword=stave+3+questions+and+answers+a+christmas+carol PDF link annotation
    • https://cdn.sqhk.co/tanusulirava/eysxhjs/tiwibodegovidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_5fe6c510b2450.pdfIn PDF document text
    • https://cdn.sqhk.co/fomolunuvufa/iE3hghd/vlc_android_playlist_import.pdfIn PDF document text
    • https://cdn.sqhk.co/wetabupi/hibRd1k/tojowinebuwedenoki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fc664b07acca.pdfIn PDF document text
    • https://cdn.sqhk.co/mojikeke/fAiaheE/smart_voice_recorder_paid_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422631/normal_60049320a410e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380675/normal_5fe4a3abd96bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419650/normal_5fcf6bfc5751a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_605e03fe1cba3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425487/normal_5fff067b3ae73.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/legevub.pdfIn PDF document text
    • https://cdn.sqhk.co/nazalugewu/KrnfCgd/minigun_warzone_reload.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_600e39655f36a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_601fbaff44ee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_5fd7d36915311.pdfIn PDF document text
    • http://merokomazojewi.scienceontheweb.net/85047974479.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/62485da6-d4b5-434b-98b2-9dab0d1b3e32/salvation_langston_hughes_shmoop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed06f4b3-00ba-427d-a635-ff8161c21c78/gupadim.pdfIn PDF document text
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_ae3adc49dea845f1b240913f283d221b.pdf?index=trueIn PDF document text
    • http://xurosuforudev.atwebpages.com/is_xvid_codec_safe_to_install.pdfIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_d8cb5ebb2da645aaa1754e0d025fbe4e.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC78 5604 bytes
SHA-256: 9f303ad48a29f29c55ec124083994f3f469275b67f402c62795a20ce85346232
font_01_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 10628 bytes
SHA-256: de74461723f5f2a1d90ae18d7653ec6a9441514528581b87ffe4694c6621c21e
font_02_sfnt_off000123b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2