Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1d97a15822d0e9…

MALICIOUS

PDF

81.8 KB Created: 2021-09-05 23:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8befb1ab9f30d957110afbd4dcad22ac SHA-1: f6b7a27c4a0bf4a9985510b5068facf1c47f500b SHA-256: cc1d97a15822d0e921a7605880031c300f7377f36cd3d9c017f5c394f227f13c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification further support its malicious nature. The file's structure and link distribution pattern are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5559

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://huntic.ru/uplcv?utm_term=tassonomia+batterica+pdf PDF link annotation
    • http://allprintusa.com/admin/images/file/rijelakupogixo.pdfIn PDF document text
    • http://ashioke.com/images/library/File/383526430.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/zojanewirigeluwo.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/wananupak.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/19561378327.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/44a70b6a235daf4292bd08a9ab22fb61/41728242596.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/23387059411.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/jijivari.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/7109f70f3d1693fba5c39690b98e0280/44586580783.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/93d73c993be170c5e2dbf9128533716e/jevisozasa.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c37a3f22294---15895619745.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/sekozomalezijofusogepika.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/ronagometobij.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/2334247869.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/a837f31c5d07168a1e8813c58476c6ad/mafoxodadurijitadizegi.pdfIn PDF document text
    • http://reichspfarrer.sk/file/89600084205.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/4175530414.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb766b6728---ziwetisamefenivutuxavidun.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160aa256a079c1---7532838414.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/6597bb713f91418bb58ab7929197bfdf/xewetupizegedisigejekif.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/91144146985.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/winovibevepoj.pdfIn PDF document text
    • https://geo-decouverte.kenamedia.ch/ck/ckfinder/userfiles/files/10431517463.pdfIn PDF document text
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/70499255726.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_off000108e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E0 10836 bytes
SHA-256: 8b7815c144e45d5bfa2cc0c0354a6b87bc05cb42079688bbaeee58df622eb822

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