Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6173a4a7293869…

MALICIOUS

PDF

70.9 KB Created: 2021-09-24 21:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c1c010265bae6b4d0f8bab86cac909ad SHA-1: 78a160745fc83141b129803ce14a240177e50f7d SHA-256: 6d6173a4a7293869f7939ea539d7867892ba9fd45f43b7a00e83a9d99400697c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or other disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://myphamasia.net/upload/files/wajeriregunejipixaxure.pdf In PDF document text
    • https://sysyanginguvenlik.com/uploads/files/ditagerivizuxotunixalokeb.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/f893ea3c45ebe2fd6e4000bee1b77916/39295531618.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/vojovubej.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/zuvebez.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/jemizuwosugiputo.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xegibavijivopadugitotere.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147dc6f7c567---82840115980.pdfIn PDF document text
    • http://idominjazz.com/fckeditor/userfiles/image/bewutuzudalana.pdfIn PDF document text
    • http://vakaruinzinerija.lt/userfiles/file/naturudagolovuwavavosepan.pdfIn PDF document text
    • http://www.culturehousesun.org/photos/file/buluz.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/21281895571.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/80983488790.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/nakololozexonirop.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/tadidajuzubixuza.pdfIn PDF document text
    • http://js-space.de/userfiles/file/sekewolowozo.pdfIn PDF document text
    • http://zmz72.ru/files/file/79616966357.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/45098195547.pdfIn PDF document text
    • https://dienmayminhchau.vn/uploads/news_file/xeniv.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/vipujuzinozigonoxo.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/15329473925.pdfIn PDF document text
    • https://regenerateacademy.com/file/33190079462.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/wazorajovovafojinibag.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5ef34ff0f---56537063958.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/fujodasimuwisukeviwutix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=onlyfans+hack+mod+apkPDF 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_off0000b285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB285 10696 bytes
SHA-256: 2c2cd94209574d0e261223dc579cce1b81f78d0ec8dc027519416fde3b0f991a
font_01_sfnt_off0000caeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEB 17032 bytes
SHA-256: fbc1c300a981a9797edd6de4387940fdc660e338028aab767270cdbb775c91e1
font_02_sfnt_off0000f644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF644 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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