Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe2281a6d2ae48f…

MALICIOUS

PDF

86.9 KB Created: 2021-10-07 20:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 85e03c92705562d194bb6dcd77716ab5 SHA-1: 9339ded7ffc48ecb311d281d12ce540b4e249edf SHA-256: abe2281a6d2ae48ff1d6803fa822ac228cd4dbee911cb8a01b1d7cf8a0454d2c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URIs, many pointing to PDF files on distinct hosts, suggests a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://thietbivesinhsonhoa.com/webroot/img/files/funosimitelanozuko.pdf In PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16141a13ce63fd---dipixaterurufawak.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/24003417843.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109020318414367.pdfIn PDF document text
    • https://softwebstar.com/shop/userfiles/file/vekezexuju.pdfIn PDF document text
    • https://norservis.com/files/files/mawezogogovatojunivu.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/jokipopelatotosopibuf.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/zarisejuxazutawozajemibu.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/15373201889.pdfIn PDF document text
    • https://coluer.ir/documents/file/88801627099.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/16788949198.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/miroxewadu.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/simidopes.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/zurarig.pdfIn PDF document text
    • https://ms2oke.com/contents/files/83468482148.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/vejemo.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/tipikoguguv.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/35031767306.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/45855219377.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615e8b701e4a0---71946615018.pdfIn PDF document text
    • https://citrasas.com/userfiles/file/80779698726.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/vejamuwuvarexokoduri.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/93395958245.pdfIn PDF document text
    • https://kinizsibank.inweb.hu/_user/file/bapamex.pdfIn PDF document text
    • https://elemonbg.com/Files/File/21394523656.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1632014727.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+joy+of+creation+reborn+android+apkPDF 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_off0000df63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77A 10940 bytes
SHA-256: 3cc30083e394e8e4c2fa4218262681f3c3ce7fc5bec0d65a7ea1f1213f366728
font_02_sfnt_off00011090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11090 23716 bytes
SHA-256: 49e392864876edf3a6613d1f68d398edc8c8be2c459ef6944b1db231f68c852d