Malicious PDF — malware analysis report

Static analysis result for SHA-256 beae43bd15167459…

MALICIOUS

PDF

72.6 KB Created: 2021-09-05 00:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 33f706ee03247808e920e40e84ad7752 SHA-1: 8f00062c592d906b6173d42ed3eea4485e02ee04 SHA-256: beae43bd1516745957051c9f3178f94cf298fe8705b39c1fe46233d115c87573
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://oriental-kitchens.com/userfiles/files/93023071487.pdf In PDF document text
    • https://naveenent.com/administrator/imagetemp/file/domawakaxane.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/guxorafoxutamamuxonixerem.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/besirudogozomewekamazot.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16081a9e15105a---59777682924.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/lcm6tq7cvnde787jfb2oj3qcve/misagoteravi.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/wunefob.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102b424eb8a6---vivasesewobevidunonodepof.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021070414235873499.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/2jolmiaj97t0ug0ijd133aml8p/sigofokodafi.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/a38sqj0nofle9i5opb495tjtua/mijominipafupebalodor.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090c0651b740---fumiwilalujurozobaronajan.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bc7e7101f7---lawonijase.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/97c61d8770768796a73d05a9fff09e4b/51449061911.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7c5305657b---57120772548.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/f63745ac470d959cd99f3a1eb8d01859/molelebanasegibakunow.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/zurateridoter.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/saxitizoxukukulo.pdfIn PDF document text
    • http://one9five.com/userfiles/files/73052046992.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc4348c44a---kewapimefewelakozuv.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32c382264c---30393353219.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab469d76e2---19899129094.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/66743998252.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/1q31ob3uiion4cgdoq95tdcho2/73094408680.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/wizopadavad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=elgato+thunderbolt+3+pro+dock+manualPDF 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_off0000b5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC3 16824 bytes
SHA-256: ca4aa3324a6fabf5c526a400d0575644ca89382ea3b04ef8dfec1b3a2a46020b
font_02_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 11188 bytes
SHA-256: 6039395378c488637efc09553d212d6e169a15f495decb238bb9531eb0be0f54