Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4f7ddfa196e5f5…

MALICIOUS

PDF

89.4 KB Created: 2021-09-17 03:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e61f00b26e113d1238f68cd086a8b9b1 SHA-1: 2fbe7301961ae9b0fe727de42bbe949557fae330 SHA-256: fe4f7ddfa196e5f54309db491a508f96d579dbc8a262e7032420edffa85ef0f8
174 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's content is designed to trick the user into installing a browser extension or update. An embedded JavaScript stream was also detected, likely used to facilitate the download or execution of a malicious payload. The numerous external URLs, many pointing to disposable domains, further support a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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
  • 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.
  • 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 https://ketchas.ru/uplcv?utm_term=add+adblock+to+chrome+android PDF link annotation
    • http://lasermedia.cn/userfiles/file/96085539478.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/93462785914.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210905_CDD7D3386B2CFFEF.pdfIn PDF document text
    • https://umartravel.com/files/76306972495.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/sikudiguju.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/konojajigobesujabulop.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79512076101.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/manelolinu.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/49640052665.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/ruxexopurowa.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/93992973283.pdfIn PDF document text
    • http://taociren.com/upload/file/2109071348487907518irkcw5zh8kp.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/38638138008.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/pakenaxibu.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/69582864219.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/19187104010.pdfIn PDF document text
    • https://hidropomp2008.com/uploads/userfiles/file/xipijawoseliguman.pdfIn PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/gajirogafowixi.pdfIn PDF document text
    • https://tch.lu/files/files/gowomikujuragifateg.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/54411033771.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/83976364828.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/duvabolasititiju.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/28639184643.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/boxebekapotesifuz.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-12/20210912070057719831.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/guxifidodinovonun.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_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 17960 bytes
SHA-256: 77da61e4e0808744b246dcb10470085f366309d3adac84bdc56db577c69b3777
font_01_sfnt_off00012724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12724 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3B 10680 bytes
SHA-256: 3f7d76b58a9c033722b35d807c490298aa655e627728a46a15178c2d53178386

Open this report in the interactive analyzer, or submit your own file for analysis.