Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9eebb09549bb5b…

MALICIOUS

PDF

100.5 KB Created: 2021-07-03 07:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 716ef188de2ceaf17e091aea3b184c36 SHA-1: 3c0f9eea7cbdbda62b1ee5f7ce92f0518fca178b SHA-256: 9f9eebb09549bb5ba9d2a85a8578831683fbd50d0d5f7a13294ee4012918cd49
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure suggests it's designed to lure users into clicking these links, which likely lead to phishing pages or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9652

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 https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/87ce1cf2133b0c7e464930cfd9eeebb3/sowisejajudameresa.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd1e12fcd8---79443818974.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/3aca02de5a2708b9b0c1199fc8513b9b/bejemugozit.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ni4eprv1jn8kbpok2irqg4e9r5/goxiguxagojokanen.pdf
    • http://amon-syotengai.com/userfiles/file/guxibizexuvutafodivomisaw.pdf
    • http://afgventuregroup.com/cfiles/file/17220329430.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/21f6b091be795209abe5f05ce8efdea1/19778964797.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/334f8c38c90a478450e19a1d15bf8684/xugadajoremelujakiredi.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aea65436259---pufolamafiloxa.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814193f1f13---57103613961.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/bqdm43uiibi2iohq6oqi80n3va/35529587945.pdf
    • http://esoftland.com/userfiles/file/terexerejazedo.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/e7ecd8eb00c98f378d89f1bba23a7c4c/toditevogudo.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/8c41145205693259769e2b16897114c0/fewudajage.pdf
    • http://koszyczarek.pl/userfiles/file/virudekesuv.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db88f5ab10---zaxavido.pdf
    • http://www.cafeinca.com/img/public/contenido/file/21299744835.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d6133d85a90---55241074432.pdf
    • http://anhbanglaw.com/userfiles/file/25633109057.pdf
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/napomusolefekosovikasog.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a011b763826---52822274957.pdf
    • https://apoiotelecom.com/imagens/img_fckeditor/file/muzituxo.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/05e3b8eb772c50462c5487d0258c2ccf/70666019475.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/90e466baf59a6cbe02fcceab8cbfe053/38072682350.pdf
    • http://tivatijapan.com/uploads/userfiles/file/74861218590.pdf
    • http://nousgarage.com/userfiles/file/rutozetav.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/dtq6kda27so68vc6dgos23d5u9/39312768374.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=does+slitting+your+wrists+hurt
    • 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
font_00_sfnt_off0001134c.bin
2f9054e14458a449cd5ef12709457fc4e5fe868488570ac89f3dbc70217c531c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1134C 10528 bytes
font_01_sfnt_off00012b3f.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3F 16164 bytes
font_02_sfnt_off000140b1.bin
4990da557a99e068a5d61e72d1ff87cda17e109cd0dd597d01f60f556837b7a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140B1 16484 bytes
font_03_sfnt_off00016bc0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BC0 16792 bytes

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