Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb0e866e0006bfe…

MALICIOUS

PDF

88.5 KB Created: 2021-06-26 19:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc321e814026bb04faa2c4e49dc24c07 SHA-1: 6563766ffd4e522a874a08d53e975b3160c1342c SHA-256: 4eb0e866e0006bfeb6180ac5434ab9ac9681461580da8a7275fbf0a591de83a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous URLs, many pointing to compromised WordPress uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/33af40db5dc0d44dd1a1af99d3a8152c/senexabetawo.pdf
    • http://boothbayharborshipyard.com/userfiles/file/12052360680.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/568e29a55ee186300e7da49435244126/notixiroreke.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/2e1bed77b193d8c30e0a4f288d853bf5/11134695909.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160975f3410497---fudetixutumisosifo.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1890944480---bogisodutodolulaf.pdf
    • http://bobiniauto.com/userfiles/file/misibudivugejan.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/cjj4flllmm4cqp8lreavclvvh2/lipuk.pdf
    • https://basisnomor.com/contents//files/ropifimadopob.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf03d6616---67078537570.pdf
    • http://euro-ex.net/images/blog//file/48066100886.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/a49cf3af03c392c6400875d4ebc509db/jevatima.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160baaef6ad3fb---75070214343.pdf
    • http://jar-ted.pl/file/61804379040.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c747b01de2---girukonipidufejokazalo.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa7028cee8---12827055346.pdf
    • http://twxcd.com/img-aim/files/27952246771.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b8a6a251102---letosesulefolak.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cb3e4537b---nobojafoxasedapidub.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094fc95965bd---tulibuxuguriwirizapuxav.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/72f8cd40e6682fe6654fcbf954a8be08/kikigusemisas.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/8df148632f282774f8f33a47c5027343/wotazowubavasomobarosiza.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac089d9fcf4---nebumerujemeg.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/238cd2ebafc5f153f1c446c0c5fdd82b/67287287960.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+draw+a+person+step+by+step
    • 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_off0000f969.bin
6bb7742beaadafa7fe130b58b2aa8ee0004b1c1f89c28521171218044dcddddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 10576 bytes
font_01_sfnt_off0001117f.bin
6f2e68779e21483b16b0ec8aca32c83127ec950683457b78ce9b6f9af5fa9299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1117F 16572 bytes
font_02_sfnt_off00013c99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C99 16792 bytes

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