Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a47f6a693193ec…

MALICIOUS

PDF

74.6 KB Created: 2021-09-25 22:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fbefaf3bfa8dad6022614b78e903253c SHA-1: d9ddee338b483ba3dc07768e48b7831ee3d1fdb8 SHA-256: 04a47f6a693193ecfdb4ca3fc13318f560e959f3dcf63190b494339d685bad84
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and presents a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be directing users to malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9757

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
  • 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
  • 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 http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144564b93f6c---15126420835.pdf In PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/27829409752.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/74126315732.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/8929721375.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2f3e67a6d---tuzebob.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/12786071910.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/85632229967.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/wiwebud.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/bazexidujegax.pdfIn PDF document text
    • http://meta-min.com/files/82445813584.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210922185247.pdfIn PDF document text
    • https://podimercrm.com/img/files/6171041443.pdfIn PDF document text
    • https://sanagustin.cl/files/4259915490.pdfIn PDF document text
    • http://medi-sen.com/files/files/43220552505.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/sobopefapiv.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/sekep.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/sejokiwurovog.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/vubazulasereze.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/libikive.pdfIn PDF document text
    • https://mattress-leader.com/media/geludotikekipovoxogupaxuw.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1614c06042fb0a---2799787842.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/savobefigutagileko.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/98586373631.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/defijofugaxik.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/2a893952a11f2ecd975d1837798ab82c/41060854187.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/66637357705.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=arc+length+and+angle+formulaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB7 2132 bytes
SHA-256: 8ad1629d78958631526aea0a74d0b163a5252944052d54f78beed5240939c1a1
font_02_sfnt_off0000d55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55A 18088 bytes
SHA-256: 006318470e64e8b3c3f8c7ecf12546ac4b25a5eda2aff08812ab7c7029bdf767
font_03_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 10744 bytes
SHA-256: 97fd11d38cbaf2ba9f5f9bcdb46164d5cb66f2782a4f605fff316cb27f769a31

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