Malicious PDF — malware analysis report

Static analysis result for SHA-256 378ecb030431348c…

MALICIOUS

PDF

70.2 KB Created: 2021-09-05 06:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1536576b059bf433ab64c16ee1a49860 SHA-1: 83bd515e5f3eba70b4ff440338a7991e802c2fea SHA-256: 378ecb030431348cd6c183fa96842c0b5d834a1d4c2602c666637538c40afdb8
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9108

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16083b17a11de5---62277358439.pdf In PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/abfe6ede07a4976f83a9dafaa14c7efc/41264716555.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/svci9mnbh5ft3s7itmgdmgsk9m/debimadipugezatujefal.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/m284bdlqj4aanr04aec6ie45ea/84953489858.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/livuvorimonolabikemobodid.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/rukiw.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/vefugumuxufag.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/texuneb.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/3oj97v2pu95gbdv23g2mitdup2/dezalebibada.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/lonuxolisof.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/78555844084.pdfIn PDF document text
    • http://nikacarpet.nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/jojofadogibakixenagi.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d117b3bc23---bovebunimukazukixem.pdfIn PDF document text
    • https://mattress-leader.com/media/vewelabid.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fb32d9ddb---72683740090.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/88780344382.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b2fe7c74e---92086595713.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/68v81qs1tkog7tjqf6o9jot393/zowibupewemiwusoziraban.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/ranebezupunugedalej.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611328c83c756---67829819857.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb6f392764---13664297189.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/56743123915.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c394a14e488---rotereravodofedu.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/082f0bd215a208586d2e350cc1850fe3/wolurebew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=sonata+2009+user+manual+pdfPDF link annotation
    • 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_off0000dcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF1 17816 bytes
SHA-256: d9fba29405b00ac25b3ab2f2358761bb3865b511a1b863249b9d24f789e5e6d6

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