Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8cbf1af524d89dc…

MALICIOUS

PDF

79.0 KB Created: 2021-08-15 22:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2e638d9bf8f2dba9416d48f01001454d SHA-1: ec8ca09c71302f26b5a7538f22ba5a1619d6a2c6 SHA-256: e8cbf1af524d89dc93ebfdaf3559378923b3056091d13d25c123e27605298e80
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous external URIs and links to compromised CMS upload storage, suggesting it's designed to redirect users to malicious content or download further payloads. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5802

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=hanuman+ji+ki+katha+sunate+hai+mp3+song+download PDF link annotation
    • http://vyveva.eu/UserFiles/File/jifipejoresisidefurelaj.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/pasopojuzasiwivapojaruvu.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790b8634d6d---fesapimejiguriwadufagutab.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/6901056498.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083e6e9432db---92867974744.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/12070424946.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9594062fb51b628aa79e730bcc3bb66e/52508733450.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/dusepejeguwokawazo.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b320acd3953---53632557343.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/eu2f7qtv6vmflo2brsei78mmq5/83747752245.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/rabutidojekazunaxe.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acd227fffe---80569302533.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b74695ebd---108739575.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/95173703635.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610353ecc19a7---77598361159.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c78970fb8---62302024293.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/84968804494.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/42427354057.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/kedosotinexifop.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeef9ec786---14790413349.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/93944130697.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/virufivefazurinuzipe.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/68bb26fc86e7fa544ecad3c5c658aa17/kigupobobaroburofuvu.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/tokuravo.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/tigugazegewovuselurub.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/setufegovatarod.pdfIn PDF document text
    • 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_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 11308 bytes
SHA-256: 12c0feaae5273b3acdbc4316dddc48693ddbc55893cc5b9a4a81c03da5aaa679
font_01_sfnt_off00010023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10023 17780 bytes
SHA-256: 2c92aa636d6d2c94918c6a795c1223bdd898665c1324f00fb499236098989e54