Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aaeffc888e2a69e…

MALICIOUS

PDF

82.8 KB Created: 2021-09-19 22:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c87226a9c0bda383cecaeab6d7975b88 SHA-1: bb08a20cbddaff28132473e0c5594162f8af5c6a SHA-256: 2aaeffc888e2a69e9ee17cb7b38d94ac2bae81edf2c3408276dadc3b56120026
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. The presence of embedded JavaScript and numerous external URIs, including one pointing to a potential link farm, suggests an attempt to download further malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic strongly indicates the document's purpose is to trick users into providing a password for an archive, a common tactic for evading gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://digitalqwerty.com/ckfinder/userfiles/files/64486862909.pdf In PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/pigagixojejokusel.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/taberux.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/66037068305.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/taxatorurorap.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/sidunejebejesewojipeb.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/5317594505.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/86256388944.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/vurukexijoman.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/koratonezozure.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/19711135958.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/1506698112.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/18247037075.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210905090157_1761985808.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/gukavasi.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/jabisalukobuzokimonizor.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/xamarudumenobibasiduzoka.pdfIn PDF document text
    • https://megalight.lv/uploads/files/57816085801.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/lozib.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/xedezanep.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/labilenavovudivoti.pdfIn PDF document text
    • http://rotarytattoomachine.co/project-new/christianbook/upload_images/file/45302845022.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60472757277.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/23436095861.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161457934c99b4---somavejagebowub.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/57723430862.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=baixar+programa+para+desbloquear+celular+androidPDF 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_off0000d9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C6 20288 bytes
SHA-256: d4e7cc9a42f210bd279ae13b4e80b0fd20e0b7fd6b079d3176e21711eeef3775
font_02_sfnt_off00012373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12373 11300 bytes
SHA-256: e43eeb976081606c8919bb95d6c3de700eea17d8a1d7627d02f91437badda0cf

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