Malicious PDF — malware analysis report

Static analysis result for SHA-256 9946136c7831231e…

MALICIOUS

PDF

87.1 KB Created: 2021-06-29 19:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ba4dbdf30c3c7852a34a8439e1d7d6ce SHA-1: 89bf3607e7ddeac639e28916e5067827ba889d92 SHA-256: 9946136c7831231ea53fdcd7fb3b3b3a6bea4d4d7645705b23987a3e3197971e
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and exhibits characteristics of an advance-fee scam, including lottery or prize language combined with parcel delivery requirements. The document contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, which likely serve to redirect users to malicious content or phishing sites. No scripts were extracted from this sample, but the presence of embedded JavaScript streams and the link farm structure indicate a high likelihood of user interaction being required to trigger further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://garglob.ru/uplcv?utm_term=24+hour+currency+exchange+near+me+now PDF link annotation
    • http://bhs-class1957.com/clients/35434/File/20699123192.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/44854422809.pdfIn PDF document text
    • http://katheran.com/clients/55933/File/kobimaweredebuzawavutunib.pdfIn PDF document text
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/gevega.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/gezisewibanitopod.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707b689f16e---16141875091.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/de9a4ed7f4b30668186794719978fab8/27835702815.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160753431db714---36497816577.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/11426129608.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210614145733.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/k8a6l4av3vnpbcpisjmafaqrta/28969783542.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33914072ef---sakexepabanosileki.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/47270429220.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/q0fcunjq7k01tuomg8ujm7heco/39101979999.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071edf44bccf---fazoluxidenerivorap.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/m470qscn9v0760tkffcrsnmbhg/57993198161.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cc631444861---sidurudutegojumur.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb95747e9f3---kedekawonaxa.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b35351a3f---nonumagipopobulutaboni.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bf35abeba72---62225974019.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/pulivaxe.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/vebopot.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/5b2eebe19240849b6ba01e6b6b061f1e/difipisejimaxubox.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/71009580386.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607e749406e67---96127845817.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210602_075227.pdfIn PDF document text
    • 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_off0000eea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B8 17580 bytes
SHA-256: 851f786fb27afca3e632bd5919d9e4563104b3859053c83e14e9ef50a25301f4
font_02_sfnt_off0001343d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343D 10776 bytes
SHA-256: 46ddf1b09815b139bfaaedc91bfe3b6c451d52261e333a8f57fdb6398c335348

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