Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2ba4b5ddde1896…

MALICIOUS

PDF

82.1 KB Created: 2021-09-15 18:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c175908c894dcaac4930981433e9022e SHA-1: d301e38bae73197fa9ff5169614d1bf5ee522c3c SHA-256: 2e2ba4b5ddde1896238419251aede835aeb15bdce68655ef12a6651350e92ce9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate malicious intent, with a confidence score of 0.997. The PDF contains numerous embedded links and a heuristic firing for a 'download button' lure, suggesting it's designed to trick users into downloading further malicious content. The presence of external URIs and a link farm on disposable hosting further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=gta+5+skip+human+verification+download+apk PDF link annotation
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e925d8760c---wibadapumekuxojoralubow.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/11407101921.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/fiwitulusarowojina.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/sopozewovunibidi.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/29828697224.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/72451571614.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/seminib.pdfIn PDF document text
    • http://modero.vn/upload/files/fuvuxizodixasedifijok.pdfIn PDF document text
    • https://basisangka.com/contents/files/zilafolabojidotewasovur.pdfIn PDF document text
    • https://777mto.info/contents/files/wixazilubovubebokiv.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/tukemalajaxepisizefamagi.pdfIn PDF document text
    • https://sinaia-vik.com/admin/fckeditor/editor/filemanager/connectors/php/file/xiwukemojugisekifabebaxad.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/60021151198.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/fozamu.pdfIn PDF document text
    • http://slsnn.ru/content/files/43117586246.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/43689235699.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/97629660636.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/zoxosalekoxofute.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/553f286887cf21aa02585e6845674eb3/teliwinuvoluragibibumit.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/34303366041.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/65114629123.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_off0000d37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37D 11400 bytes
SHA-256: deb8a11187a178cb5200cb0894b00fdc6fbefd10bdc8d6d3d1634da9ed68baf3
font_01_sfnt_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001066d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066D 20076 bytes
SHA-256: 884e1a40c9a3ab9453f7c3c6ae002c9bf3b3fcbfd80f4dbdef53dbe6dacbcf79

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