Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2416dcdf59bf5e3…

MALICIOUS

PDF

80.3 KB Created: 2021-09-07 22:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 503d3b18e1aeb192afc5db92b39f1af6 SHA-1: 98f75e14d843ed6cfe28b5d135d4fad1419c108b SHA-256: e2416dcdf59bf5e38cec964e53be95d2e7285eb3836d6513d3ded40eb37a795c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript suggests an attempt to execute code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • 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 http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a84c45832d2---vutoxelofirepe.pdf In PDF document text
    • https://petek.biz/resimler/files/pasironibosudejudet.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/16503948172.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/difubagijelezotazidun.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/22910460409.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/99387472622.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bcac8bd2b---galilus.pdfIn PDF document text
    • https://tecnicamistasnc.it/file/gujinaragox.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/214153627.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a906d570db0---rikemur.pdfIn PDF document text
    • http://skkl.cn/filespath/files/20210820174428.pdfIn PDF document text
    • http://zatacorp.com/upload/files/43355461376.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/vjcr3a6l6jregasfel03t591r2/gobiwedoxuwevulutuno.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/f641866d0c3e1e3a1e8eaa1a0152b696/tisexaxaruzomozenadumok.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/52599063732.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c20c73918---65134715293.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/30624659977.pdfIn PDF document text
    • http://www.first-classlogistics.com/image/upload/File/palemidetotodeg.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f437b6d6191---33447562489.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afa08fb85cd---jilarig.pdfIn PDF document text
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/mubenakagajubebineziza.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f173eb82ad---zozepibobizunek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=macbeth+summary+scene+by+scene+pdfPDF 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_off0000d615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD615 17116 bytes
SHA-256: c1e9124329bf00a8335e32812095382a2071e265bf413cb2ea7aeedd238f5218
font_01_sfnt_off000101f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F0 10976 bytes
SHA-256: d943d8f108b0595808d463a2bc6b8528b39d966007f962d25c67cb4bd3ef4625
font_02_sfnt_off00011b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1