Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab2d1bcd173ad5a…

MALICIOUS

PDF

75.6 KB Created: 2021-09-03 21:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 76ca2c91d88dbb30ac137bf24c619c54 SHA-1: 3b3453245ef7abc5db415a2e449f8c9a749ba163 SHA-256: 6ab2d1bcd173ad5a68a29920f17d59a9c6e7acf7a088291e4c9abe6a0bf4fcf8
204 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded JavaScript and a lure to execute commands via the clipboard, suggesting an attempt to download and execute a second-stage payload. The numerous external links, many pointing to compromised WordPress sites, indicate a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/97c204aabb06faf6ee1a6f607968f0da/81917873073.pdf In PDF document text
    • http://foodchemsino.com/d/files/xupemaguvupugoketumoluka.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/21597545948.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/pikaru.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160f16b664500e---13133757072.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/dujanusakopademamodanigo.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/87823667500.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/52059981702.pdfIn PDF document text
    • http://esistore.de/userfiles/file/bozazusavirow.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071e3d4f3f53---92923810547.pdfIn PDF document text
    • https://ayurmitra.com/files/file/redejemukuvegimuxiboz.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/woneropojirafozarari.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/vfhvtn4ooon5vbu19gd1r2c3k4/jazurowemetekukiduni.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/fazizivex.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/78823744498.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111c90dcab39---runudixudenefibe.pdfIn PDF document text
    • https://diphong.com/uploads/68998910311.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/viwukakolotasawu.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/5t76hf0kbodi43vpkf6ojr2qlo/98125223474.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/todeduwu.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fe8f4b49d---kefoden.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eeede8c86---jawuredokaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=convert+html+to+pdf+angular+6PDF 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_off0000c104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC104 17604 bytes
SHA-256: dffdc84084b259ad62993b1e1fdcd56bbe6fd5a1d44d4a66e975b5a366d38d28
font_01_sfnt_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 11048 bytes
SHA-256: bcc985eeb89aa6b4745c3c836fd9ab6a09379c2b82ddb78b82d256c62e8c0fe7
font_02_sfnt_off000108ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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