Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e9e699c8a598c4…

MALICIOUS

PDF

72.7 KB Created: 2021-06-29 10:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b06f18fde5028e06ecba016ac9caa7e8 SHA-1: ef30e79d87a1d17b253c25edb629064bf84f09ee SHA-256: 56e9e699c8a598c46e45068a16354fa9f20d30e627c5ce37e9ae80b2029e2b7a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, acting as a link farm to redirect users to malicious phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, but the primary attack pattern involves directing users to external, potentially malicious, web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7457

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://crysiq.ru/uplcv?utm_term=how+to+checkout+a+new+branch+in+git PDF link annotation
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c223f14cd67---toromozuzi.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/c5cf6350d8d046f808c16c084f22e3d6/rewewujazawitos.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0153ceced---55532787966.pdfIn PDF document text
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/tukukimawotajalogujerenis.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45546725f3---gopofisolulukujot.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/18518449797.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/46795713627.pdfIn PDF document text
    • http://webursitet.org/Files/file/loduzoworazevar.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160944867f3136---gepite.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/11660607343.pdfIn PDF document text
    • https://immobilgold.com/file/72681506090.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/piwupubatadisumuwuzezuguw.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/c25146d088bacc42c47600dba4b1e59c/72444077058.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d24cbefed3---36409298442.pdfIn PDF document text
    • http://armanetti.com/images/26903919813.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a354a3630---36801527072.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/rabokopuxesu.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/81375974984.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/62482157741.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/87450904908ed2c126be986164cac927/55273405903.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/fenabeteki.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/wimatiguvimawagufekawise.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/23384112050.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d23138b4e5b---3103002435.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 17128 bytes
SHA-256: 40b6b23812d7d7913c9e8eacef7507e5454c5e534c51b50c234d981706f4762f

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