Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d81a656b411a76…

MALICIOUS

PDF

101.0 KB Created: 2021-07-30 17:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 679673f241fe7e02b5269b5818d015af SHA-1: 5416daa14aa16671c7a808ebda1e90bb14ae1672 SHA-256: 45d81a656b411a767b96b6f1316cf991770ef7f3adc9648e2991fbdaf943132a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm or phishing campaign designed to redirect users to malicious content. The presence of numerous distinct hosts and the use of 'utm_term' parameters indicate an attempt to manipulate search engine results or lure users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 6

  • 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.
  • 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://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/vin23vfliv7b46s339eemrcqn2/57348690026.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/616re1ufg0b2sste1dt7jcqsgv/37093680973.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16085c8bfd98b5---51577654286.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ulon4o89nkq0l5v527kq5ini21/70543369157.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/32c95b27a12ba5b1636d288e473fa3d6/rowanagalufoxusilit.pdf
    • http://urparitet.ru/admin/ckfinder/userfiles/files/88159701328.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3bae8bd6e---72423627954.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee5be2692f---32053385134.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/3d58f701e1fb62eab8d321418ec60322/20817377559.pdf
    • http://nextgenship.net/upload/file/20210613162358198112.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/so2q8vfaq0pqr9k42ttk06gi82/50482597004.pdf
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/1553c7bf55d2b7187bd764af221c7a49/25539605575.pdf
    • https://georeno.ca/userfiles/files/47711033192.pdf
    • http://momsystem.ru/public/file/jawudiwuwabomijewuvena.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8497644e43---9113411041.pdf
    • https://anjingliar.com/contents//files/serezelowulofukowoluwi.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b52399f209---65815540435.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160760ddda478f---49035327322.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/tm5pvh628ascq2ebiauq15p284/puxexovujew.pdf
    • http://ventima.ru/userfiles/file/39201281611.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/443d59c839c10983d5a43c5d9ed6d73b/94619589598.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a26a95a90a9---9980043475.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c83a5d2886---28511767413.pdf
    • https://fceresources.com/ckfinder/userfiles/files/57841532643.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/0ccfdf255f30a97b8503de7daeac4257/dojogumadibexe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tenorshare+ultdata+for+android+5.2+7.1+keygen
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000155ac.bin
f3f46adcb90fa3cd9c7a490d3cee79200d039d382fcb04b052b178cc10745eb0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x155AC 26780 bytes
font_00_sfnt_off0000f574.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF574 16792 bytes
font_01_sfnt_off00010d86.bin
af7e7487d427cec169f92e9a245a1898798f1755f309e4b765c7a3bce9695b9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D86 17412 bytes
font_02_sfnt_off00013b12.bin
886a1e01e434240279dc510a0a7f6855eb6940ba486a75b80801bdb5573d8b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B12 11324 bytes

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