Malicious PDF — malware analysis report

Static analysis result for SHA-256 94827e4e003a00ce…

MALICIOUS

PDF

74.9 KB Created: 2021-09-20 22:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 99219d50a64e0864c106f2f19a8aeac9 SHA-1: 3f729e220cd07a67924cf615520d338122cc5e04 SHA-256: 94827e4e003a00ce7b168232a4d0d4d2d8b9af016f735366d7f8997d0483a78f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest the document is designed to redirect users to potentially harmful websites. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to facilitate malicious redirects or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://wastran.ru/uplcv?utm_term=pokemon+black+apk+free+download+for+android PDF link annotation
    • http://taxfreepoint.com/file/vurini.pdfIn PDF document text
    • https://dpengineerindia.com/admin/userfiles/file/8132176487.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/4900133617.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/31770333535.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/88319032756.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/xejelawakopevur.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/basefisofozubelis.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/63626303427.pdfIn PDF document text
    • https://paperland.bg/uploads/file/58447868116.pdfIn PDF document text
    • http://directopinion.biz/uploads/FCK_files/file/24730563326.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/vajudidajosunataku.pdfIn PDF document text
    • http://cx-gl.hu/images/files/16846206716.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/rivoxupoduponeve.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/faloxabuneluwatesowup.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/jokemodawelufozedaz.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/vafiv.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/mewixonumeg.pdfIn PDF document text
    • http://grasslandtj.com/upload/files/pinamivafawan.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/31058480921.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/jabuxarako.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/80425805954.pdfIn PDF document text
    • http://registermycompany.in/admin/userfiles/file/zowumifidubujizo.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/47846712903.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/32332994401.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/tegox.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/78453321759.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_off0000be67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 10836 bytes
SHA-256: 6dd23228e9ee0c2110c177f648bb9f1dc8687db968dccac4d5f4b3ce4f943a9c
font_02_sfnt_off0000ef40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF40 17868 bytes
SHA-256: c56fafc1b6fb3cbe8a9d287619c866d7813b26f2e573b5f894a9a6ffa5977195

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