Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e0be5804f3a446…

MALICIOUS

PDF

77.3 KB Created: 2021-09-19 03:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 584d992ca7d494c332dc8a3374122369 SHA-1: cb3886a0087c506782b707534c9de397d51ba0e1 SHA-256: 06e0be5804f3a446f017b30cf5175dcecb00ed1f9fee7a834dace90a1a4b7816
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 CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or initiating further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://safewatersolutions.in/ckfinder/userfiles/files/41143477360.pdf In PDF document text
    • http://snft.ro/media/file/fixotizenobili.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/75982191813.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/19581721445.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/98598389570.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/86411452883.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f39fe4979b---wovesexol.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/vulawuxug.pdfIn PDF document text
    • https://kitchensofdiablo.com/upload/file/28997639153.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pezunefeduwuxom.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/duped.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/92bd0593a0da93da743bebb8e4995e24/pewupesaxezawol.pdfIn PDF document text
    • http://otczenacts.com/media/files/vowabofuloboge.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/dizajosuzegabugonewujof.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/geteratakiforiv.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/xinibuligimumezivumekixi.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/razofuxazamebenut.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/34092088167.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/11448808404.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/jidafalumazawugituzimofem.pdfIn PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/3042941862.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/73273543038.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/kejenafiwane.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144e9dfde5f5---devagabup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sarita+choudhury+kama+sutraPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FE 18264 bytes
SHA-256: 54692ed5be5d28c5288b39c98f7ed14894f85bc78de60b0e9ab5304a0f782466
font_01_sfnt_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 10736 bytes
SHA-256: 6288c1f3b17c117c37d91e3c6c518ff2f3e4d0468dbc7068e0504018d3a33971

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