Malicious PDF — malware analysis report

Static analysis result for SHA-256 127b917feb062fff…

MALICIOUS

PDF

59.8 KB Created: 2021-09-11 15:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1715e2e8bfedd866761e93b358275fdf SHA-1: 4a58e4e5a6ee75c67faaaf2bc6dc166dbf66f47c SHA-256: 127b917feb062fff880f973dadbee501f450586068349b88a2ee47e69971371d
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a common tactic of using link farms to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7193

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://drafthe.ru/uplcv?utm_term=pokemon+ruby+mirage+island+cheat PDF link annotation
    • http://ugyvednok.hu/userfiles/file/67208807134.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents/files/54981016059.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/12296784843.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/28776258077.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/79334683218.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/a5ef1a5b045d8e39774e23d93228f4dc/mufisupexa.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/294357c265f48487348ae3c680688942/46152957522.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/zeziwumojegoxe.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/radusifiro.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/21968453136.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/lanisozapinedo.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/30887758240.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/33959671643.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131596d74b0a---vizoxikip.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/luwabijo.pdfIn PDF document text
    • http://robbes.nl/media/files/pemin.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/kifuxe.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/botad.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/zozipinabisudobem.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/afa0ct43djjhv2udvtop3vq6v0/siziropusoxirixudis.pdfIn PDF document text
    • http://ausafe.net/images/art/files/kujeposigijerexogitapu.pdfIn PDF document text
    • https://netpage.info/userfiles/file/gagojib.pdfIn PDF document text
    • https://raguvosbaldai.manovonia.lt/images/files/gejenomewefa.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/vevolaxusagapu.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_off0000c404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC404 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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