Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2545170df6bccf5…

MALICIOUS

PDF

77.0 KB Created: 2021-09-08 18:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3b057c1468b13b383743886e6a12be79 SHA-1: a27407c64a3721971756ba2d38a18d2a3bdd15b9 SHA-256: d2545170df6bccf57919b56c84417961a47ff2697d26a7f88439830c9f0e4c59
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The presence of these links and the overall structure suggest an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://hotelmitrutarija.com/uploaded/files/sinuxevobodaxisomi.pdf In PDF document text
    • http://unchiulmihai.ro/files/fckeditor/file/nilinawofev.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f789fa049f---47256030895.pdfIn PDF document text
    • https://ekransamara.ru/files/jiwefutarazawejabebode.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/28889437424.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6e7b9401441f04c3273cb9793f9296b/14812314902.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/47037824937.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/40744175476.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/20012848718.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/jidafifa.pdfIn PDF document text
    • http://planetamama.ru/files/file/33817847116.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/86056446320.pdfIn PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/novexibimuve.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/55374221835.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/51785969408.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/pibezajuwumalop.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zuxitisepazufujiwevarila.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312ac15f5db---jejuwinuzisosise.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/lagabad.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/derog.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/37607387232.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/fojisugewugap.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161334e48b7a26---xitofesuwamesugazefiwof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=halloween+worksheets+for+first+gradersPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82D 17812 bytes
SHA-256: 07fbfc9c59f6a9e91b5778534c7aa2310a2a48c65ebf92a7ed5a246f0cf1d480
font_01_sfnt_off0000f60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 10804 bytes
SHA-256: 87f09cd338fdddf8d086ae3f5f0d592ba9c79f3951d75b2380759c230e573d8a
font_02_sfnt_off00010eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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