Malicious PDF — malware analysis report

Static analysis result for SHA-256 105922d611a4342c…

MALICIOUS

PDF

64.0 KB Created: 2021-09-21 05:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f18220835eb7df4588bbc5e01ecc707b SHA-1: 4c87ffd0e15b8c29bcf9ce9def35da510dd1c25e SHA-256: 105922d611a4342c021240eda9e27c36ca3ada9b1ad68291513ca77c84b9a7c1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a link farm attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5692

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://allytemp.ru/uplcv?utm_term=how+to+see+someone%27s+instagram+photos+on+private PDF link annotation
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147d5a3d39b6.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/b7ff243ae6e24db2819d94abd60da3b7/lagewutirobifevulexuw.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/19462441684.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/78877448357.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/43285462956.pdfIn PDF document text
    • http://vipdiler.ru/files/file/veloweboxawopuxorofe.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/gukilizebazovevotute.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/xuzat.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/79443508308.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131a299be0a8---rumewisegamijo.pdfIn PDF document text
    • http://hanyuchina.com/upload/files/vigebaguguguzu.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/kusebofaganimeladoz.pdfIn PDF document text
    • https://didaktika.drmix.cz/uploads/files/wanopabijizugeruj.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/97699449715.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/6ebe6105db9ac4b87983589d06c3d919/fokuvofariru.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/dixutosokamet.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/51221254069.pdfIn PDF document text
    • https://khanikango.in/file/81481160771.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/nusolojuzixedalaxi.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/duwef.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/tujojogaborase.pdfIn PDF document text
    • http://888chji.com/userfiles/files/ledejabixinasurenabaxix.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/xojazubevuraborowiza.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/tagibepamawuwalol.pdfIn PDF document text
    • http://neteyes.eu/editor_up/riwavetujipinajaled.pdfIn PDF document text
    • https://lapdonline.org/file/41240642975.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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