Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e819bc47f44898…

MALICIOUS

PDF

92.3 KB Created: 2021-06-26 04:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c21505b979240364d25fc8080968e44 SHA-1: 143b3a15fa88d7aebb3f6047969067df3fc4ae57 SHA-256: 30e819bc47f44898b394535d4a980c73fd6eda2bd204dc2cefd5a140e8d2ca7f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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 https://avela.md/userfiles/file/37330786593.pdf
    • http://usateatop.com/_upload/files/20674933278.pdf
    • https://uleshuzataruhaz.hu/files/file/74545885150.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/b21a6d19f611bebe6fcf3dce089f9105/bipokepokusopi.pdf
    • http://kingsauto-bar.com/js/upload/files/7134496505.pdf
    • http://blbr365.com/userfiles/file/1621064791.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16075771c20418---zunenotubiputudisabowa.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16091fb52c8a11---29223199997.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160757476cb8b5---39072743896.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/d34fe198a4e920203a1e82e53db9fba2/jugiborafuto.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd58a3039---85280639391.pdf
    • https://curryleafharleysvillepa.com/hang/userfiles/files/naxaraxapezuperezokolovir.pdf
    • https://atraba-holding.com/userfiles/file/1531003014.pdf
    • http://vimbark.sk/editor_uploads/files/50778411401.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d08a33983da---73761373031.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/c1edbce580836f19eecd719d843df908/44908565495.pdf
    • https://vmwarts.com/ecovic/file/44718479936.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957ea31e63f---sukodonubudikifunuvorobu.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a1badc176---83202601714.pdf
    • http://amadpich.com/userfiles/file/15047233041.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5120a1148---53610985225.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c63f729e60---78512289034.pdf
    • https://amursvoidom.ru/media/files/gufed.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/i3704b7nq6a6qd942qbm4q2p3d/dowixivezotuwonodiwi.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bd4f3a582---34660065573.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=student+result+management+system+source+code+in+java
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 16792 bytes
font_01_sfnt_off000119e9.bin
c2f9dc597bc26ae2a6892fac48a57a3ced35f69a25e6d5ce1635cfe5286a9861
pdf-font-stream PDF embedded font (sfnt) at offset 0x119E9 17384 bytes
font_02_sfnt_off0001478a.bin
8a4d940a8b140b86be856a8e686c933ddb5c19c0a146bf200bd7572771f30d40
pdf-font-stream PDF embedded font (sfnt) at offset 0x1478A 11200 bytes