Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad7571f9b1c05c1…

MALICIOUS

PDF

62.2 KB Created: 2021-09-17 04:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e60b1b884855e1b9ea0bffbcb102a28e SHA-1: 497229b5c81524580dced45f588769847768d59b SHA-256: 9ad7571f9b1c05c1bfe038856ff1011cea27accae8ed6813037bb0c7e4b98a98
154 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, several of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection indicate malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5242

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 http://franceplus.fr/userfiles/file/lopomovexezaxe.pdf In PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/52530541031.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c60f4e4db5---61122994278.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/visexatejoguxoda.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/78130913369.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/l4rtibjh5ilp34t5crmfrfujl4/judanegiwopij.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/56020155680.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/37967380838.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/noxerivixejanixuxukuvofef.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/92304214535.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/7eb146a9dada1051c82723d25975a8e4/43796102899.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/fexosuta.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/bafojifogeziwotunuzukamob.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9d749c769---gaxibitas.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/fegiderakoxevugibem.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/vubivasogerexagitemodeta.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16139ae2eb006e---15157893756.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a66e5930fdfe7eeb2fb4a093fbf8d0c9/59350132829.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/51696520806.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/43410233319.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/zozanumepulekefafopor.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/mezitaririvevufakunili.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/vivugilonom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=after+we+collided+stream+online+123moviesPDF link annotation
    • 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_off0000b0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E0 11112 bytes
SHA-256: 96d7deea0ec569785c9f718126f289b2efdb492764b15c36735aff7e041b2e42

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