Malicious PDF — malware analysis report

Static analysis result for SHA-256 9edeb64e06fcc858…

MALICIOUS

PDF

63.8 KB Created: 2021-06-02 03:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0e020716757ae212010b598ae71d758 SHA-1: b60080faa057f8de1faffa72afbb63c5be1f8ae6 SHA-256: 9edeb64e06fcc85869bbd95577c85d004c903d48c302c33aa484ffb8b4bd7862
154 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The primary URL, 'https://synerhu.ru/uplcv?utm_term=what+are+the+best+discord+servers', suggests a phishing or scam attempt disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://synerhu.ru/uplcv?utm_term=what+are+the+best+discord+servers
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091c0e56ef36---bosuvagixipowoverefale.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-5-10/20210510124827895085.pdf
    • http://veraschwemmle.de/fckdata/file/nebizeganejutuke.pdf
    • http://beijingxinzhi.com/userfiles/file/20210507015830_1301139067.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607751cde28e0---gewezasajolumol.pdf
    • https://clumba-indoor.ru/files/files/kawuwidizeje.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859173b7d48---kaxogomoda.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/qve4i16tjha3rrmvf66shd5935/luserimuvinive.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/25c8ce0b565814e507b9bfaaad89f662/83801378979.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/21832ee7c79ee470cd46d1e6cc6a66e7/75677568931.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac82e0d877---pixusubaguva.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/lirorudawatijigapatuvosan.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608016128b7cc---vokoteno.pdf
    • http://akinmedical.com/uploads/file/xaxurolatewolar.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/8503202200.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971d9986b55---sunimotuzijoletiga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0af.bin
c23bab0f5675f327de74e530d4cc5c2d9fdbf971303c0021b9c19ae18315aa19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 5208 bytes

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