Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08d7fa04e822047…

MALICIOUS

PDF

86.9 KB Created: 2021-08-13 12:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a480e3de95f48ee08010d2cf37ab4887 SHA-1: e38ff5426a633091c2ab85facbf0284e032e770b SHA-256: f08d7fa04e822047da65bc38dbfc4a9b856382104ebb735d60e7d3939f76c7f7
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 and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The presence of external URIs and a high ML score indicate a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://asja-doll.ru/userfiles/file/zanetevomewijuvu.pdf In PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8649e68f16---kekakekowuferaxaxa.pdfIn PDF document text
    • http://edgecs.net/documents/31499177763.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/11505310472.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/205637322dc5a191195333ce3b32294b/xiveburovixofukizojafezuk.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608969f981744---bidomoxazividukogebelovil.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095da9b94a1d---wufajatar.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/36919249799.pdfIn PDF document text
    • http://vkts.se/userfiles/file/60520457698.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/39488265872.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/es6ndmcvrbq32aikjnd81l50me/18525755849.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160796f1621cfa---72413729173.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/882e98c985347800e6c6f56e7ac36bd7/xalimoguvuwirilovamolo.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/63557198314.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210609044711.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd03ce3f77---76117641914.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/lolibezamojosavefobijew.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/45ce4af0a0c407f7c2684b9de89edcbf/kejazilusu.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f14e8ca9---24910959264.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/bonuloxifabus.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d52e4f8e4---julavimipebekipatosav.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/zagok.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16223000106703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+cheat+in+slime+rancher+pcPDF 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_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 17084 bytes
SHA-256: 54340ad9846cf74968557dc75f40b6558cd18cc7dd0f051198818a55c2135759
font_01_sfnt_off00011ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FB 10716 bytes
SHA-256: 722789bdc2cbe504b1ca3a57e96d6f6e4d68d491f485c433493c9abe9bfe6ffb

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