Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8e57a2b1a5e031…

MALICIOUS

PDF

71.2 KB Created: 2021-09-15 09:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 86db33cb8f4eb2ce516189dba5a0f0d8 SHA-1: 4b7cba27e0d992c71e657b24941fd7a236cb3559 SHA-256: 9a8e57a2b1a5e031d6a4aada1836ff9ed9d1a16bae42abce003560aa5390092a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a link farm with UTM parameters further indicates an attempt to lure users to specific, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=hungry+shark+world+hack+2019+unlimited+coins+and+gems PDF link annotation
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/88450536417.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/xogurito.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/26722a6b1eaf6e52e22692459f226231/kebixuruzekoxosevudiz.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/48538868841.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/10682289416.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161312f934f310---73344815244.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/razalinavikit.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/39086358473.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/34709157754.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/66011838752.pdfIn PDF document text
    • https://successstudio.net/userfiles/file/85787776825.pdfIn PDF document text
    • http://keitbg.com/images/files/lukefala.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16140a893c0434---nejesabuk.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/161410fb56c4d4---54625985333.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/48391190987.pdfIn PDF document text
    • https://mfdesign.hu/files/file/39047449012.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/48332453293.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/guzasifepopomane.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/75662519853.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c74258a04---17154536380.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/fuxuruzaxosopope.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/fuzabiritowuwuxinipofoga.pdfIn PDF document text
    • http://canadianrockies.info/files/file/17468999021.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_off0000b158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB158 15776 bytes
SHA-256: cc3aba4e67179ff7325136c80b5ae643ea11e7ed9a3f9828e2e6a8019d82a13e
font_01_sfnt_off0000d9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C4 11660 bytes
SHA-256: 21edb62f8b38e47630a7a03cce5c661dbdcf01e2fe9e84e9184a0c528f7be94e

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