Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf1ad4214b021a0…

MALICIOUS

PDF

71.0 KB Created: 2021-07-08 00:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f010d27d953b8b65309d187a72f125f7 SHA-1: d11e0def29949844b298d6099cfa05c66b2e110f SHA-256: 1cf1ad4214b021a06cca6b572043b3d8bc996c05a6b329697cfd0f7d3ac9f9b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed for SEO poisoning or phishing. The presence of these links indicates an attempt to redirect users to malicious content or solicit sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5042

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://wastran.ru/uplcv?utm_term=a+serbian+film+full+movie+download+isaimini
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/6kql7f710tppnpua6vopsvmaah/41927435491.pdf
    • http://oticonshop.com/ckfinder/userfiles/files/55475017931.pdf
    • http://asfalon.com/__files/file/jibukumozabejewemu.pdf
    • http://imhkayseri.com/resimler/files/kotunerisikunizexoruxusi.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c417125c59e---rorexewofefamun.pdf
    • https://ebooksweb.net/files/file/gulotonogetabexik.pdf
    • http://asea-admin.com/_userfiles/file/20210627145112.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/ed983be03e8b1f31541b435661b440f6/gidipuxedirax.pdf
    • https://energooptima.hu/upload/File/54793063398.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dada48324---36446681530.pdf
    • http://mkngsp.ru/upload/files/nudogigilowobitazegobob.pdf
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/degelufugivaku.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/3149d1efd152f367940c0c568b667084/jizefamovedisoduga.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085568c48829---valawixexuruz.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a860fddbdd---79932382012.pdf
    • http://taskentcompany.com/userfiles/file/votuzowofetawolobawupexu.pdf
    • http://liebherr-tr.com/userfiles/file/sagalasuretasi.pdf
    • http://anhopphat.com/uploads/files/poriwiluzopeke.pdf
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/57918912285.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/bd95f3c8b8ad86ef2c395c201b7e8c7c/5050961154.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844cc2d6e1e---gagozo.pdf
    • https://pottoka.info/files/galeria/files/xazogewizenixino.pdf
    • http://softwarefactory.nl/images/file/22084540549.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/cic5narnbdeqap5mk0oj9aopma/wixed.pdf
    • http://holidayservicemarsala.it/userfiles/files/19842484198.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/df15d0ea6d1d2cc6c051b32a1cb81b96/xawobokimikixoxoli.pdf
    • 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_off0000f419.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF419 16792 bytes

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