Malicious PDF — malware analysis report

Static analysis result for SHA-256 25296b917d83d01c…

MALICIOUS

PDF

74.8 KB Created: 2021-09-16 07:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 89fd959e2501847921342d1ca344126c SHA-1: 46756360be1b7056f59888b0c6a8005919422c82 SHA-256: 25296b917d83d01cbf76723b74ddaf5823c7259412379e7ac0ae052cb2f38870
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also features a link farm pointing to various external websites, some of which are hosted on compromised WordPress installations. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The combination of embedded scripts and external links indicates an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6559

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://adamlegal.com/userfiles/file/kogosul.pdf In PDF document text
    • https://prawobrzeze.info/userfiles/file/fidugutijaviwiwunibara.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/3686064681.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///wupagosupenusexotaxo.pdfIn PDF document text
    • https://diphong.com/uploads/norivifuzoliredaro.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/86016169170.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/47725594724.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/554931554.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b5c372606---piwivelukibe.pdfIn PDF document text
    • http://kaies.cn/upfiles/210911010113171870u74cn3.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/59f2552b0f0377f87ce6ba2b2eb469ff/43667313302.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/19997171502.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/81786182413.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/vubimunewenezo.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/rokumege.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613970689c409---baguvijobubamobupak.pdfIn PDF document text
    • https://laser123.com/geektic/files/40665736656.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/jozubudikimon.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/bumabu.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/wizewetagazasadil.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/jajenev.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412f9db4e08---23703083665.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=fbreader+android+apkPDF link annotation
    • 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_off0000d4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D4 10280 bytes
SHA-256: 0302d27f5f1a518445a07ff3cc5555d84ebf8735fa8d528e0207b9c5b26a4cf7
font_01_sfnt_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D5 17952 bytes
SHA-256: 71a30940868dbca13802c27d7388c3dfe972b969dd9e45c12cfb2f28c01bacd5

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