Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6eb4948fc646cf1…

MALICIOUS

PDF

68.2 KB Created: 2021-09-25 16:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f043a14385c93817c0d170b3536f5d9f SHA-1: eb23f12f83f3b0dd299504b91d987404e431e005 SHA-256: f6eb4948fc646cf1d49c8438eafd44b789402558447f0fd1b7f1020cd1d06df0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and is flagged as a phishing lure due to its image-only nature and clickable action. The embedded JavaScript likely facilitates the redirection to malicious URLs, such as 'https://crewmak.ru/uplcv?utm_term=artrage+free+download+for+android', which are designed to trick users into downloading further malware. The document's structure and numerous external links to disposable hosting further indicate a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://crewmak.ru/uplcv?utm_term=artrage+free+download+for+android PDF link annotation
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b877c72c1---11087279586.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/31622664339.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tudapokoze.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/79014842420.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/nisodizosutel.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/poguxapotugenavuketoxe.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/xofufutufisal.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pavasupozowe.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161327304ad680---mijolejifasisazuz.pdfIn PDF document text
    • http://svx.su/ffile/file/57322924098.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/mefawuwimavowid.pdfIn PDF document text
    • https://geloracinta.com/contents/files/kedagabojogekogubopa.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/sizetagokituratovo.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/18813209029.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/jojenalizidetonafewar.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/5640065001.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/kolefirisenisafa.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/kasefutoge.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/3391820783.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/badimamibe.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/poxefufoliwawureditamider.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/20526780667.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/19567980897.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/54337867289.pdfIn PDF document text
    • https://hssanesteban.cl/files/66594646515.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_off0000afc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D9 10428 bytes
SHA-256: 17abd6363312e4fc8f68e5bd6563f1a5b426149d996adbc1557011c024a77527
font_02_sfnt_off0000df6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6C 14324 bytes
SHA-256: cda1e6769ba3dd9340fcccfa9d77dde981678e818bf38592694650b950caf9f7

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