Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba14aa6b18ed5d24…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 19:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2fad406f9a06d3afc7ce8fd27b8280d4 SHA-1: 025aeb35d92d73bb4343fc957039c7813ac6523a SHA-256: ba14aa6b18ed5d24b563d94d458dcf6f68405ef3fc5685a42bc53a81078047eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or are structured as link farms, suggesting an attempt to lure users to malicious destinations. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.
  • 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://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/33380451e4839fc324179633efe1508a/17000204149.pdf In PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/80137525088.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/88092987306.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/17284402302.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kjkaphdm38nrderdncqr8u56u1/79058434416.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/f3795585db3cc00392c8a3c9be67cc01/dufigemilogofipawida.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/15909556509.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/kuverirufapubodibu.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/31327893124.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/tobonexofukonopob.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/14018010104.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/jazup.pdfIn PDF document text
    • http://altus.pl/userfiles/file/64134765818.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/lolukosatudedez.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/90190127292.pdfIn PDF document text
    • http://minhphucvietnam.com/uploads/userfiles/file/16492611393.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/nefofefovego.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613838f3e05b2---63661969197.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/mutepanuvaj.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/65712652209.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/44973081546.pdfIn PDF document text
    • https://happyfun.tw/uploads/files/202109110509139156.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/roxurode.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/mukewabuxixebujober.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68525017992.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/budimo.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eebc6723da---ratasokizebugikatobej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=qwerty+keyboard+download+for+androidPDF 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_off0000e752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE752 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 17084 bytes
SHA-256: 47986d322973786828e2dd00d116732efdd8266deb99580086948d35e6bdd187
font_02_sfnt_off00012c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3A 10668 bytes
SHA-256: 8f14b979b65a17af997cea40628528cf968a9d4f49138088f491d9eb1a69389a