Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee18b35bac6689da…

MALICIOUS

PDF

91.3 KB Created: 2021-07-07 18:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de07729cfbeda29ddcabcef907e16239 SHA-1: d6d57ed60fa3ab7a339ab05da7f7420eeda0b7c9 SHA-256: ee18b35bac6689dabf497e4a2b3d7675a67e2a7aea64bf6ba8764daa5cb51099
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of a 'download button' lure further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/bcc89be3f3bd9cb8cbe5911cad18c004/66667495679.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d062a64d38---guzirozusazebisuxef.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae421c930f4---vitojoj.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070cb7e0f820---32573055100.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/pukela.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c2431c8ba---ximojasad.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cacb7c4046---24964768727.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b148afc1599---jofunure.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b176cf3f255---94097766199.pdf
    • http://bannails.com/fckeditor_userfiles/file/kijesagedevibonujumetes.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/4f252df16ee26255e5ba1326a9f26bee/66531358891.pdf
    • https://norservis.cz/files/files/74144557526.pdf
    • http://araonline.hu/uploads/file/wubotogofubovija.pdf
    • http://fujavietnam.com/images/Download/42596884674.pdf
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/mufagifujasa.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ni1uks7v2fl6nbfbrmk8a9ru92/76314055940.pdf
    • http://novussiteyonetimi.com/uploads/file/nepajiwalazajovomipovosuv.pdf
    • http://novichiha.ru/pic/file/takitijoxeseweviwi.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/e0081f3ac20ffc012c4a5939c944c008/wuvagulodamalire.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/f3be6fb75af9661402bfdd2e914e4dd8/58017582488.pdf
    • http://geo-equipe.it/userfiles/files/19906170592.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/716ifaa9d82ptok5l68b8nn43k/41281091531.pdf
    • http://bigpictureresources.com/userfilesbigpicture/file/62159599113.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=here+by+alessia+cara+mp3+download
    • 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_off0000d96d.bin
ffc5f8ab9f40a562c060ff948e5860aec0b4773f8dc550a48286b42bcc507299		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD96D 11080 bytes
font_01_sfnt_off0000f30a.bin
f03507eef64a0ce201fc2f9f81343309b5db9cda465632d2db45cea85e5adde0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 19104 bytes
font_02_sfnt_off00012550.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12550 16792 bytes
font_03_sfnt_off00013d61.bin
e498061b7b034631fe1b1234466de5a049a8d3d5cc6a905fd11f7e9227923694		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D61 19348 bytes

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