Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab4132be5430a92…

MALICIOUS

PDF

84.4 KB Created: 2021-09-14 04:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 49211aa8191b4c35b92e3569eba2bce1 SHA-1: ba7ae9f5f7db268dc774b0fe5b1088642fa727b7 SHA-256: eab4132be5430a929bb51fe76aaa38b87e44a86998f42614077abd45be13370e
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://insp.biz/img/file/82653106652.pdf In PDF document text
    • https://theelementrama9.com/userfiles/files/muguluje.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/84059817224.pdfIn PDF document text
    • https://deepex.hu/hirek/files/87559840261.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f488a5d701---90997692918.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95938992715.pdfIn PDF document text
    • http://rotang.net/userfiles/file/64503633078.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab04613b45---64417159501.pdfIn PDF document text
    • https://llbyggodesign.se/UserFiles/files/xokozimizuxopuni.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/30624755117.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/33549469119.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/zupalovapuj.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/zuvojavijiwefave.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/jufugikejaderikotiworugo.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/93352775800.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/79341484758.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/madifanuzedari.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/misakujoremerufesof.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/fosulamuvopu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351a05f27ae---50206999794.pdfIn PDF document text
    • https://chp-travel.ir/data/file/42434379880.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/budagukelidenasejul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=after+party+roblox+idPDF 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_off0000e5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE1 18020 bytes
SHA-256: 43066bd3bcd78c3b52d10a5e29fdf10946cba9540bf5022df84b515ff6ff7969
font_02_sfnt_off00012c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2B 10556 bytes
SHA-256: 0d8556be2b24ae001981a42857b2481f2a0657032da3d351823654e99a10e372

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