Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0f0b3f81a34bda…

MALICIOUS

PDF

85.0 KB Created: 2021-09-23 17:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 37f36a8cde82aa17471fd8c7f361a9b2 SHA-1: 99ba84124a2706d33d137a79be1835b5aef4bfce SHA-256: ea0f0b3f81a34bda56f4b86e1b58afcc4c081912c3b0614472e288950b8d6376
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains JavaScript actions and multiple embedded URLs, including one pointing to a compromised WordPress site. Heuristics indicate a 'Payment redirection / bank-detail change lure' and a 'link farm on disposable hosting', suggesting the document is designed to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/pl27276238un1tooidueso73a6/sesuduke.pdf In PDF document text
    • https://hamasataccessories.com/userfiles/files/kibevebonesufolinakoraf.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/54836916414.pdfIn PDF document text
    • http://princeverma.in/uploads/files/67872565520.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/rukexadi.pdfIn PDF document text
    • http://popmetre.com/news/files/larugozibewerijugelotixe.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/fiwuvija.pdfIn PDF document text
    • https://guijek.com/userfiles/file/43405719838.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/757rust7o844l3lhkvlq6vjo8f/80771397647.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/48965591910.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/88130709805.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/wopubivuregivuketakisivu.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/govaxazoronafodapirutorem.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/pugivebanonevepeletitatax.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/ee2898fa609f7693dc5186c9f500787a/varodofejigajabudel.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/1814170981.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16140f0989dfb5---tujuzis.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/24961934356.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/7589180602.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/87624599628.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/gefafulikunixadedabaz.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/5951890436.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/68382445941.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144a283719ba---61452233608.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=nova+launcher+change+app+iconPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 17736 bytes
SHA-256: e5ba576cf88b7424563797a8c3b2cae58919682da6a7ca80873cf1eb397e4486
font_02_sfnt_off00012e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E91 10532 bytes
SHA-256: 973cc98cbdfb04df5bd8b37a2b4404ab0ae111f912caaa358f6a3f5668a39d1e