Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7d0b2cc44a60cd…

MALICIOUS

PDF

80.1 KB Created: 2021-09-20 04:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aba31f6df9e9368eaf275a01694d4d28 SHA-1: a766df7093227ae744749dc392ed44feab637cc9 SHA-256: da7d0b2cc44a60cd6ca2f6fb5bab6af71b9b6cd3177197adec55bbca0fd70ad1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://studio-orlandini.com/userfiles/files/96653813433.pdf In PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/10521143077.pdfIn PDF document text
    • https://clubon.top/uploads/files/juviwa.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/69548629081.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138374fe27b4---zoxaluz.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/xaxuwexodufubexoboga.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/43120490798.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/detorogo.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86776795024.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/31725064912.pdfIn PDF document text
    • https://kultmotor.hu/images/files/75947074181.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/44626159968.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210917_0C25A3D3CF0C416B.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/6130aa7d59df5.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/tenetunusuze.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/95764059972.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/11/jutexawarosenaz.pdfIn PDF document text
    • http://aptekadc.pl/userfiles/userfile/79263611989.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/nofopuvunugodazimi.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/bavafitatexumobuzavad.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109050127433077.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/82818738031.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/zimifo.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5a475d211f0acf968a333b2352a842c5/xojut.pdfIn PDF document text
    • https://makenie.com/upload/files/79714173412.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=eliminar+redes+wifi+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_off0000d528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD528 10484 bytes
SHA-256: e20b8edd293205c7b492f1c057c9151ca02885c1560eb27e43bd2ec28fe39cab
font_01_sfnt_off0000ecec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 17740 bytes
SHA-256: 195742ff65785d716f2f02846904de5bd7674a7b34e0d8e64390e8fb2748b633
font_02_sfnt_off00011a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1