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)
MD5: 38f32284d636ded7881b8f20131f0efe SHA-1: 751440c88b7bdee0a023d3cba042793ecd2de13c SHA-256: 38576d48583552b2071ed47fb0e792409d964814ff0f638d16beb4cec3fabe5d
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or redirection mechanism. The primary URL identified is 'https://ponafet.ru/wix?keyword=stave+3+questions+and+answers+a+christmas+carol', which likely serves as a gateway to further malicious content or phishing pages. No scripts were extracted, but the PDF structure and numerous external links strongly indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
    • https://cdn.sqhk.co/tanusulirava/eysxhjs/tiwibodegovidi.pdf
    • https://cdn-cms.f-static.net/uploads/4495691/normal_5fe6c510b2450.pdf
    • https://cdn.sqhk.co/fomolunuvufa/iE3hghd/vlc_android_playlist_import.pdf
    • https://cdn.sqhk.co/wetabupi/hibRd1k/tojowinebuwedenoki.pdf
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fc664b07acca.pdf
    • https://cdn.sqhk.co/mojikeke/fAiaheE/smart_voice_recorder_paid_app.pdf
    • https://static.s123-cdn-static.com/uploads/4422631/normal_60049320a410e.pdf
    • https://static.s123-cdn-static.com/uploads/4380675/normal_5fe4a3abd96bd.pdf
    • https://static.s123-cdn-static.com/uploads/4419650/normal_5fcf6bfc5751a.pdf
    • https://cdn-cms.f-static.net/uploads/4460060/normal_605e03fe1cba3.pdf
    • https://static.s123-cdn-static.com/uploads/4425487/normal_5fff067b3ae73.pdf
    • http://lalikexitaxixix.getenjoyment.net/legevub.pdf
    • https://cdn.sqhk.co/nazalugewu/KrnfCgd/minigun_warzone_reload.pdf
    • https://cdn-cms.f-static.net/uploads/4468551/normal_600e39655f36a.pdf
    • https://cdn-cms.f-static.net/uploads/4485699/normal_601fbaff44ee8.pdf
    • https://cdn-cms.f-static.net/uploads/4446263/normal_5fd7d36915311.pdf
    • http://merokomazojewi.scienceontheweb.net/85047974479.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/62485da6-d4b5-434b-98b2-9dab0d1b3e32/salvation_langston_hughes_shmoop.pdf
    • https://uploads.strikinglycdn.com/files/ed06f4b3-00ba-427d-a635-ff8161c21c78/gupadim.pdf
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_ae3adc49dea845f1b240913f283d221b.pdf?index=true
    • http://xurosuforudev.atwebpages.com/is_xvid_codec_safe_to_install.pdf
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_d8cb5ebb2da645aaa1754e0d025fbe4e.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

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

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