Malicious PDF — malware analysis report

Static analysis result for SHA-256 0127461b068562d6…

MALICIOUS

PDF

51.2 KB Created: 2021-09-13 11:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f066814554335129d68c85ab0f3c800 SHA-1: f58a3faac307e5ab53f228c740fa3b265a3881a4 SHA-256: 0127461b068562d68387869b724d1b65f85c5ce1fc20f4fd1dbd853473d0b4ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of common malicious PDF tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7281

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 http://thaisomboonautopart.com/userfiles/files/xezagedageru.pdf
    • http://upsshop.ru/ckfinder/userfiles/files/dolatubamasipowopivowosut.pdf
    • https://superchills.com/userfiles/file/lidokejaguwimubinev.pdf
    • https://esperanzadeavila.com/fotos/file/zubuku.pdf
    • http://recviem.ru/img/upload/60572097558.pdf
    • http://shinyoungvalve.com/userData/board/file/mabotaderaterepez.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f26ca75549---64561233593.pdf
    • https://castilloexterior.es/ckfinder/userfiles/files/detijobapopapirinomej.pdf
    • http://henzefashion.com/userfiles/file/lajomogalerapelupavedu.pdf
    • http://baovekhucongnghiep.com/upload/files/7557026228.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/52d4e3d2044ec5ba8f366144915e7f48/gakatuxinizijopukinule.pdf
    • http://tecs4.com/intranet/ckfinder/userfiles/files/duwogon.pdf
    • https://dakhoathienhoa.net/images/files/firisivimesinonitigi.pdf
    • https://halkapsikoloji.net/userfiles/file/muvivalegunakaxesixizof.pdf
    • https://facades-et-traditions.com/actualites/file/23505206140.pdf
    • https://impactmediaresources.com/userfiles/file/12647542816.pdf
    • http://artwatch.ru/userfiles/file/juteponivozu.pdf
    • https://karaari.leaddeehub.com/userfiles/files/tetugi.pdf
    • http://yuanjiangchem.com/upload/files/81092431122.pdf
    • http://chongqinghaohong.com/upload/files/28261177422.pdf
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/wisuwonodugorekok.pdf
    • http://carbontuning.ru/file/jinez.pdf
    • https://0922.sproname.com/files/userfiles/files/71382208988.pdf
    • https://clicksnepal.grnca.org/img/files/files/vometijoguninud.pdf
    • http://grandp.ru/userfiles/file/57811513768.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161313905a671a---gugewijewit.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=the+lorax+full+movie+123movies
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b758.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB758 16792 bytes

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