Malicious PDF — malware analysis report

Static analysis result for SHA-256 09484a192afb4d52…

MALICIOUS

PDF

102.4 KB Created: 2021-07-08 05:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0c00a5b040a3996e4e1105b5000381cf SHA-1: dd24849ef04d6da4a775ec96719e5c0c543f5c35 SHA-256: 09484a192afb4d52459b95d3e61590f58af94df17738e967f76d2ce6f0ef7f97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting sites, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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 http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31352038397.pdf In PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6618e21c2---42860736220.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/41506102285.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/6302469696.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/96000008759.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f787c4a7b3---95634355201.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/sabugotanesusatot.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/mifadamapilufevarugopexe.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/6c509e28ea0a45421cbb2eec77ccbb91/wawuwodo.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607411ce2f208---51778148166.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/81900351c7342fb151d16fb9e8158b62/wirudozelijogelorokezorut.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606f50b8f12a9---26214690337.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed369a40b8---basubi.pdfIn PDF document text
    • https://avvocatoboretti.it/file/61208567232.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8b6562285---78383959277.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b0051027f4e---gepob.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608839dc07327---82130189341.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd4997b021---86228070648.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16075860ccae17---53373525886.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/segowifawogaraleni.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/e2fdc2b49ce6f45f7b91cbd114c952a6/diwipopeju.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/lusifetejuxowi.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0ff43ba29---bofazufavi.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/6a287eeb421e36a1f1be42f164c3f9ca/13951292400.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/19103914886.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/pujaga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=late+night+quotesPDF 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_off00013040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13040 17376 bytes
SHA-256: 841dcc93aa580a3efea56bd95cd675e0d11fa6c37e0672a8d7a59cb294326468
font_01_sfnt_off00015d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17525 10444 bytes
SHA-256: 2d4e98bc7922b50b9fc52bfa4f1adedd25836857df7d6e109ca7c090ee4eb0a8

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