Malicious PDF — malware analysis report

Static analysis result for SHA-256 7170601fe3d48484…

MALICIOUS

PDF

82.3 KB Created: 2021-09-01 10:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: babacd54eb40d86e3a5623fcd5d62162 SHA-1: 14206a91afee7a158ab8a7984c9486969e9d36f1 SHA-256: 7170601fe3d48484b2d00f9771e1cf45b3cb8eaa1ad4e27d19ef010844d6641e
196 Risk Score

Malware Insights

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

The sample is a PDF document that employs a social-engineering tactic by luring the user to install a browser extension or update. This is a common method to deliver malware or steal credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, and the numerous embedded URLs suggest a phishing or spamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://huntic.ru/uplcv?utm_term=how+to+get+omegle+to+work+on+chrome PDF link annotation
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/72dd3466da4b5ad13983d5a6378b0c49/kobupipedobumubidag.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/83b1928e5f16460ce3c7e57d7b3f35f0/16955502460.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/0i986gg3vnlju8jnt71v0h447o/84767602689.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/k2k8mgi8c7nu6rjbjk72mkc37j/kuwosatogivifevexiperal.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/62005459549.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1f7867966---79244870719.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/nagivugizon.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8ab8980b6---kutufuxoxifatilokufixili.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd068e39737---tanamabikokaz.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/f49f68493df654c172fd12acf600f322/55903941362.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49d8368b80---94249839978.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/jebokevemafazijanatavejow.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/63833342596.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/71738760964.pdfIn PDF document text
    • https://puntoagricoltura.it/file/loranafudipamus.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/99159782207.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210728080506.pdfIn PDF document text
    • https://penal-garazh.ru/files/90388547783.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/mipufakurirarulofe.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/70498441974.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/36550850430.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607901418d107---gabeguzupitu.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_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 10424 bytes
SHA-256: 818e1ab639beb44e1bfb63de0dfdecc3025b1c04e708cfafcd3322f1285a240f
font_02_sfnt_off00011023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11023 16736 bytes
SHA-256: c7d9264df2dd062aa0912ba3bdb5f31b2bfa3ac8716a24c9ba7aa699d7172d7c

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