Malicious PDF — malware analysis report

Static analysis result for SHA-256 30894c20e3656204…

MALICIOUS

PDF

76.5 KB Created: 2021-03-16 10:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8ed500f6dfc037c53f9593d62a2a5bb4 SHA-1: 2a23452d8fa69ecee1bf831cb8a5d78de5956e1a SHA-256: 30894c20e3656204106d262d2c438c0f7c9a444a63c0ee51e0d2adc1cb162aab
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spam campaign. The ClamAV detection and ML classifier also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs suggest the primary goal is to redirect users to potentially malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6943

Heuristics 5

  • 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
  • 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://vilenefex.ru/award?keyword=arnold+blueprint+to+cut+pdf+phase+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459479/normal_5ffd3f8c95553.pdfIn PDF document text
    • http://itravelgr.com/bushmaster_xm15-e2s_riflekk1fa.pdfIn PDF document text
    • https://bukudemedu.weebly.com/uploads/1/3/1/4/131483547/7616024.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/aWhhSgc/pisoxage.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/gebAgju/dank_meme_soundboard_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5ff5dc6797dd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_5fe69811217fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408598/normal_6029f70c6694b.pdfIn PDF document text
    • https://cdn.sqhk.co/merivexasug/SwcfWkZ/61421964861.pdfIn PDF document text
    • http://ionatr.fun/instalacion_calefaccion_gas_natural_precio_aproximadorwsd7.pdfIn PDF document text
    • http://mp4.design/dune_1984_movie_streamingbk337.pdfIn PDF document text
    • https://voxuvuru.weebly.com/uploads/1/3/5/3/135390020/livipi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371809/normal_5fddfa17b903f.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/bjdgeji/block_craft_2._11._0_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikunakudu/jhcm9ig/xudefanemakomoku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_d24afc4e7f2f447db466583aaa8c594b.pdf?index=trueIn PDF document text
    • https://eb22cd64-ba88-4d74-9269-d2b8937e52af.filesusr.com/ugd/3b217d_368f409cc3c64a30a000324c94ce44ae.pdf?index=trueIn 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_off0000f485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF485 5504 bytes
SHA-256: 5f0378db19ce68a3fa85f3eab6de2550848dc63095127c1ed74982fb6325aa05
font_01_sfnt_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 11332 bytes
SHA-256: e7460e9a94346f1e902ab117a8fc361eec218921fa1b2c9fdef8c6b59cba2194

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