Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e138add50abc4b7…

MALICIOUS

PDF

75.7 KB Created: 2021-09-07 10:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eb46241b3fa12050a9dcf36c44e765f5 SHA-1: db9827be9030b27a121a4a2c879cf911bd66d3b7 SHA-256: 6e138add50abc4b78e0c6171250d6c611e084c64bfec464ca6b7a432c5d49cec
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a credential phishing attack, specifically impersonating PayPal. It contains a link farm pointing to multiple compromised websites, likely intended to host the phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of embedded URIs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=perpendicular+bisector+of+a+line+segment+worksheet.
  • 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 http://reanda.com/jingkelun/userfiles/files/20210829091626.pdf In PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110a93f6bea2---6063750899.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/28379916239.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/zekikivaruxusidinewomapi.pdfIn PDF document text
    • https://ms01bet.net/contents//files/kuvufuxotesarigirer.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/xabilutujimir.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/44998394319.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/43309768190.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/vajovupatakivevavun.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/fe86cf04b78635269bacacbef6739402/toridiwifokimozuvojapuzaf.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/af13db800d702403d527d41335cb5f1f/55288664802.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/tanedazunejawabadun.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/zijadot.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/82000207860.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/66086285479.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f347a1ed2e---zazokosefaranetimir.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d70dfabb68b---wewilugim.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a72ea2258dc---nikugube.pdfIn PDF document text
    • http://sumterhigh89.com/clients/863574/File/puxola.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/nefesumebebum.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/tulunesowuwixe.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/23570819860.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/16ccf1fe436e153e518642674326753c/34490464795.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161158ab78cf16---dudubosevume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=perpendicular+bisector+of+a+line+segment+worksheetPDF 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_off0000c3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A4 16364 bytes
SHA-256: e67100d2364ceba55a4d7300d3fd96c453f2bb6303c836d05edb5d6b5a841951
font_01_sfnt_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 11484 bytes
SHA-256: d135bce14cb76e4ebb26ece3e40d8246f6afc1e0ce07b70317efe51daaab7784

Open this report in the interactive analyzer, or submit your own file for analysis.