Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84466de25815e75…

MALICIOUS

PDF

90.2 KB Created: 2021-06-29 03:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b33be51972cf6eb26a5f42d11f1c0565 SHA-1: d282f0c98f15eb00b80f70f8afb7228ef3a55c25 SHA-256: f84466de25815e759573b1abaa25d6f51821a543c218676a4ccfe4310655c38a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous external URIs, many pointing to compromised WordPress sites and employing SEO-focused link farms, strongly suggests a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

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://agronlogistics.com/userfiles/files/widuzevuziguwox.pdf
    • http://originalcheck.it/public/img_admin/file///56101082664.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b4e57187c---womil.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/590ee8f6d5b66efb05e5744713247b30/zobagi.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/8dd120559619c9520190fee20fd8d010/22679519378.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc92d81e3f5---75671461086.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d4d90788511d64d205a481a721854460/83481310871.pdf
    • http://akcjonariusz.com/UserFiles/file/27867133071.pdf
    • http://dok-vo.ru/userfiles/file/78445882745.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abd6de00e7---53040935932.pdf
    • http://fitviewer.biz/files/file/74955278843.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/f621ab77359ab943784007469aec7a69/xerupazo.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/f50ff80b17caef4591ee27da609cd641/kexigujogamaxuzatowemipat.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/13ea16d7d2a0e255cbd8713481c706fe/80796454544.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/138925391060a1c3e965090.pdf
    • http://fine-cottage.ru/userfiles/file/sewarazukujimofon.pdf
    • https://canionglobal.com/FCKeditor/file/jowisibelemoxezuzesek.pdf
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fafibomulepe.pdf
    • http://abpaluso.com/upload/file/kakesetavakegujimiwivuz.pdf
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/sewur.pdf
    • http://marcus-1.com/FileData/ckfinder/files/20210529_B98CBC88A7683298.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd57851dcb---49780319944.pdf
    • http://infinity-pro.ru/userfiles/file/mujalujulomuke.pdf
    • http://vencedor.coop/images/admin/file/mapegefujerapizuf.pdf
    • http://plnjl.com/userfiles/files/puzezidedilonasazu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=free+download+etabs+2018+with+crack
    • 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_off0000e835.bin
c6246bbb21fc35013cc11773b5fa5100457d34a4df5bb52473e45f45c5fd5578
pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 11264 bytes
font_01_sfnt_off000102b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102B4 16792 bytes
font_02_sfnt_off00011ac6.bin
d0afc1da35b368da0bafff9c0867e4077b730684ab790fd48e8d1906752ecf91
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC6 31720 bytes