Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f2a350773f0f61…

MALICIOUS

PDF

81.0 KB Created: 2021-09-07 11:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0ce97ff87bb2a941a345dce0f5aa54ef SHA-1: a54c46ad7e5f0eb78ed5a56287b8d36094dcac59 SHA-256: 58f2a350773f0f6133fd8c576dba7d5f5054a2a6d888fe315e707d997e6ba74f
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The file's structure and the presence of multiple external links indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://fotofidelity.cz/userfiles/file/jirakimitojometipixem.pdf In PDF document text
    • http://dui-antidote.com/images/userfiles/file/89990728274.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f43f6a51e---77624424268.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d0467b3443---polisarukatadudevav.pdfIn PDF document text
    • https://dm288.rs/slicice/file/feburazi.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/lurenabirelesuvilunaras.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/10eacf7596a59839b2707b04d33d7560/97998188632.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608524585d6e8---wusudelifolu.pdfIn PDF document text
    • https://masihpt1.com/contents//files/xukizida.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/592458328ea91cc6518dd57c0f057fa1/80069742486.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/71375010853.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/8542848370.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/28093330234.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd068e39737---tanamabikokaz.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865550dff58---nixevukesaludizeramuj.pdfIn PDF document text
    • http://goref.ru/files/file/jejakekutu.pdfIn PDF document text
    • http://lueckerreunion2020.com/clients/e/eb/eba09433058400eda594a485f9004317/File/runivudurexokizerubolixar.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/zajegomagoxur.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/texus.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/kulusizudigekidebodi.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/tovewifisilowude.pdfIn PDF document text
    • http://autovoda.ru/upload/files/64517600308.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=humayun+ahmed+book+list+pdfPDF 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_off0000d725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD725 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF37 17776 bytes
SHA-256: 3ead1295434db5ed7e399473d0f305abc1ca14c393115b949e2de314007d34ea
font_02_sfnt_off00011d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D65 11100 bytes
SHA-256: bccf493c2d5f80860c9f0ba8c49507be4c5efe825269b89ff3d24f94a053d807

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