Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69fa87560c03aea…

MALICIOUS

PDF

93.5 KB Created: 2021-08-12 11:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ef4d977a6f28a0ca44203e8b8ee352e3 SHA-1: 5fbe29ab616b8f7519ad0bcebbec3d3e395178c3 SHA-256: d69fa87560c03aea6ae6548821e9c60856bd0b00cdd7e3f3a715a1060486d6a6
212 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links to external resources, some of which are hosted on compromised CMS uploads. The presence of a 'password-protected archive handoff' heuristic and a 'download button lure' suggests the document is designed to trick the user into downloading a malicious payload, likely an archive requiring a password provided within the document. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mayurherbal.com/userfiles/file/botipujajut.pdf In PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/dffca579100e1f0f6d9975c4b59462e3/10607973939.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/tidamitoxuwedepakobo.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/bazifogodafub.pdfIn PDF document text
    • http://chinazzjx.com/d/files/91390720202.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/49561468752.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/0a44a1cab443ab1de59d82d79bac22e0/33830401463.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wuvaf.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/folunop.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/tugosasadakulofafezad.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a84c45832d2---vutoxelofirepe.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/lerudebanizamopirafo.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/xinavu.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/3ptl19igr01h1keesb639rkpm5/riropupezorumije.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/bfaf38c23f982c840f6c9b4c77bd743e/95088881638.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160963c6b12f37---rofen.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/zijekis.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/b6ace928a19fcc0554211ab6ecf93ce1/puzopopuselujigof.pdfIn PDF document text
    • http://standardamulet.com/files/files/66919703144.pdfIn PDF document text
    • http://xn--80an2aej.xn--p1ai/up/file/39400288026.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27eeb7149c---keloruwikafamija.pdfIn PDF document text
    • http://beta-rc.com/upload/files/tajoborixevigi.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/gurokevirubomixisode.pdfIn PDF document text
    • https://topjobsnepal.com/ckfinder/userfiles/files/80814811637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=licensed+email+and+registration+code+for+4ukey+for+androidPDF 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_off00010754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10754 11160 bytes
SHA-256: eeaef736125a0665d6f06bd2c81a812aa35b8f95df0ce9b79cd34ca46a6e786f
font_01_sfnt_off0001213f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213F 17576 bytes
SHA-256: 4715b84c208561d1c2f9fe4a5abf971cb4e26852e5f6accbac02e732d3998b9a
font_02_sfnt_off00014f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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