Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3141261eec9c62…

MALICIOUS

PDF

135.0 KB Created: 2021-09-13 01:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 580bde5febe664aa1ee52fbc0c75c49a SHA-1: 047125a62f44ca5b1667a16d2bc78df29a857c16 SHA-256: 8c3141261eec9c6281903975c95d8c7ae10f0a62e1846db85b0d32c3d5e2272a
174 Risk Score

Malware Insights

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

The file is a PDF containing embedded JavaScript, flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it's a link farm and an advance-fee scam lure, likely attempting to trick the user into downloading further malicious content. The embedded JavaScript is likely used to facilitate the download or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • 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.
  • 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://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1613172c473a05---gaviwejujebifi.pdf In PDF document text
    • http://accessprecision.com/userfiles/file/510270840.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/jijobebiv.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/15078963503.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/dituribelafodejabavodofag.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/90590903967.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/vegezomoxewotufu.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/22866472572.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b70f887fbd---tejijajusipulamoze.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/92502860565.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/potener.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/61806441086.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/bugitax.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/55247552416.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/48313371046.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/17359013832.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/25251974200.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/92800237841.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0248044001630641960.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/megejofeletoxunaka.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///kanukejomu.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1630632495.pdfIn PDF document text
    • http://www.siposferenc.hu/html/kevepowuzusimivasik.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/8280061134.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=2020+2k+locker+codesPDF 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_off0001ae57.bin
f140057091c7a610bdb92dbd8354070d560f04d985d5049665001de364c587e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE57 18932 bytes
font_01_sfnt_off0001df84.bin
d6fa2f0b6fe115d0cc292404b8a423f3240f77208462c2893947f065c4c2eeb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF84 10144 bytes
font_02_sfnt_off0001f654.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F654 16792 bytes