Malicious PDF — malware analysis report

Static analysis result for SHA-256 028190a5e2cca746…

MALICIOUS

PDF

89.2 KB Created: 2021-09-18 03:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0f229a3554c4e42b6b80e0e362a26ca7 SHA-1: 5505fd170d02eabcc05ab8727347353cc3ab124d SHA-256: 028190a5e2cca7467e7bd24ed1452f0852d29c6c06f883362ad878c1a502a4ae
166 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update, a common social-engineering tactic. While no scripts were directly extracted, the presence of numerous external URLs suggests a potential for downloading further malicious content or redirecting the user to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://coretry.ru/uplcv?utm_term=free+iptv+with+tv+guide+apk PDF link annotation
    • https://jackinthegym.com/uploads/files/202109021652306282.pdfIn PDF document text
    • https://termofriz.rs/files/xaxikebok.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/pabaviwibenubolaribat.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/51236431570.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/46819261244.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/60624557916.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/89594572538.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021091000382345.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/37379802881.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109111414548122.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161425be79093c---kiwixojuvegi.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/82484158411.pdfIn PDF document text
    • https://sharks-cz.cz/images/file/77216849840.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/gowejazoxoluged.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/zarunuwapi.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/divaxologovolijigijaresox.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/47714152195.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/63883804017.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/tudegejovetes.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-10/2109101254200263815krjw6eor5mw.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/48480571357.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_off0000f6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 10556 bytes
SHA-256: e6a941e99b6cf1d70e0cef7cbe135f4a7747e58bf17b98bf50ae101d64ea51ae
font_01_sfnt_off00010eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BD 18164 bytes
SHA-256: bb51407fab3ad40acdbde3788771df0e3856676a5adfbac2dd9e607357adb3c5

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