Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ec2fcbb186c022…

MALICIOUS

PDF

78.9 KB Created: 2021-06-09 05:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33c27f4d9cac40d8ec49f8fa19f5ba8e SHA-1: c94866837cf6eaa0132cac447e146e0a737fd00f SHA-256: 02ec2fcbb186c02286b84c176198a1e1efcedde06fef6724a480a8b36dddf971
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, presenting numerous URLs that likely lead to the download of further malicious content, such as the APK mentioned in one of the URLs. The presence of multiple compromised CMS upload links and disposable hosting further supports its role as a distribution point for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/uplcv?utm_term=download+apk+idbs+bus+simulator
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0c4d52f056572c0f2a85c04fa69ecb93/38767963481.pdf
    • http://mai-colle.jp/userfiles/file/podivozexaxebem.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607998a8d8081---tipiweg.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/1agnrchpgp3i1ehetvm06h4ud1/49982510911.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/4412c796ba9a9ff7758fcb48ab4db440/75092437620.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/65111085a272b67ea257f6739965e204/geperaletopox.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba5bb17b72---88251200676.pdf
    • http://zonweringnederland.com/ckfinder/userfiles/files/78087748407.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845b654633a---xidefasunepijag.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820b6d022e1---zafusopagadizalusila.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/f6t7v5nhie7bbalpq85croak2q/sidizebemojidi.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc9becb029---1975287496.pdf
    • http://ahlhy.com/uploads/file/280330348953.pdf
    • http://andlupa.com/userfiles/file/pukajifa.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607218f845e72---10601733047.pdf
    • http://anpo.vn/upload/files/towamuzevuliruzami.pdf
    • https://daismene.it/file/vomijizamuluko.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077fac607b77---98109206183.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f289.bin
cdbcab0d3921ee209960cac65191a9dc9794532f9c6c987447aa49742959aae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 5400 bytes
font_01_sfnt_off000104df.bin
36695c4593fc4d1d5cf0fe1ccd84a1a70437005f5cc86461aea2227cf5d31249		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104DF 12896 bytes

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