Malicious PDF — malware analysis report

Static analysis result for SHA-256 288d702048b50d2d…

MALICIOUS

PDF

137.2 KB Created: 2021-06-30 09:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f618c4b82fb0369527d252b28c70f165 SHA-1: e024414f2f6c35849eaccb0c30e61181f387e0f3 SHA-256: 288d702048b50d2d535539a75162dd3c9cc780f50f948660b883f52aa947ec8f
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 compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of embedded JavaScript suggests an attempt to exploit PDF vulnerabilities or execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://alemotta.com/resources/original/file/fivazifizararedijudamere.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607001a337150---wovapagodar.pdf
    • http://bukhatirhomes.com/userfiles/file/66777332805.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcd7850be7---fitupakexokuw.pdf
    • http://kartywspomnien.pl/uploads/assets/file/lebigugawi.pdf
    • http://csc021.com/userfiles/file/20210623185002_u3t2ci.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/12813877804.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b547b9d2c8a---midusagatulejijes.pdf
    • https://sentinels.ro/userfiles/file/lofav.pdf
    • http://fantalife.nl/userfiles/file/42466192396.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/ede2884a87fecd2b2858e887d76ba0da/13995638304.pdf
    • http://www.cerathai.com/image/upload/File/89772066676.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9f9e5d973.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab72f39ba2---zemumegani.pdf
    • https://acgroupenterprise.com/userfiles/file/wivirakadosus.pdf
    • http://ajivikafinance.com/userfiles/file/35570682457.pdf
    • http://barbusci.it/maisUserFile/file/68379667532.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/61dc870baf0ee2d78c005b8427de672c/91696868815.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/62ce39224354a12a78c447fd1bf37bab/niromukale.pdf
    • http://tsutae-f.com/js/upload/files/50632399679.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/598ad8a20990be58e43a43fdc1952f98/37577938483.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/d8697039633574f93c99f7e27fc1dd99/bixubikusamuzivido.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=boone+middle+school
    • 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_off0001b965.bin
9c4182b5dfcd4e78b88a181717da42d6eef642ff414152718d2202ca97573e4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B965 10328 bytes
font_01_sfnt_off0001d06a.bin
0739bd7c1df4495efb9a049539fa494e758f30b86fbe2563048368872d96f985
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D06A 17880 bytes
font_02_sfnt_off0001ff47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF47 16792 bytes