Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2ae5c8eaa71f8e…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 07:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 43cb7d8861f22a62bbc9bf6877369c1a SHA-1: 793a585ce50dd053dbe5ae762a58f4f7db51febd SHA-256: 1d2ae5c8eaa71f8e3b41fac8bde771ab39c590e1b475dddf8006eec152e5ccb3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple URLs pointing to link farms hosted on potentially compromised or disposable domains. These link farms likely serve as a distribution mechanism for malicious content, such as phishing pages or malware droppers. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://tourgardan.com/basefile/tourgardancom/files/kawoloxujuwazolere.pdf In PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392757eedb4---lobafagifezitipixefut.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/38164025637.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136efefcc9f9---gemose.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/bunorezak.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/25191774090.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/sinoj.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/wojegomodobaxezejado.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/dowugomaraxagigojefi.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613380e3a0d6a---ribavimozeborodilugutoxed.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/3526059514.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4a74310f84b61f8da1190244738d1f2e/lupenujofegumunidi.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/73942846350.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021091614302242.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/7dde9d02060efab7fd455943a0fe71f0/mevaruzaxirejemuvusitu.pdfIn PDF document text
    • http://schokofontaenen.de/idata/4216619839.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/bupedikujawu.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16140936e61098---mivajifelitide.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/281qq5cvbt1o7tgudcech3jk5g/58086683815.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/bowakefofutilu.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/demavisererubokoxusuloda.pdfIn PDF document text
    • http://prograsifkalip.com/files/90915114165.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/61543218855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=photomath+pro+apk+downloadPDF 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_off0000d8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DB 18092 bytes
SHA-256: 51d830a2dbe4d823c6f2acdba4b9317c2071974759bf8adc34dbc63ad4cd31e0
font_01_sfnt_off0001069a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069A 10444 bytes
SHA-256: e84c4491938674644d3b20cb1eba878d555954570e51a5d6b1cf4db9949d7499
font_02_sfnt_off00011e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1