Malicious PDF — malware analysis report

Static analysis result for SHA-256 293add8de9f36d70…

MALICIOUS

PDF

76.4 KB Created: 2021-09-05 11:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d87551cdda9c215e526f249bd2a527a8 SHA-1: e87e158c62d68d652ee20c201b2a1838b4ca5345 SHA-256: 293add8de9f36d7007683f8337896472d7942d5ea19233550e9042278d4fbf35
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites or use disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/vekimosilapepesono.pdf In PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/12353245502.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/90935024863.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d9f47ede96---51427749758.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094b94398896---dupeb.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/zafibovifidipoxulugag.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/86669915654.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/55268104307.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/091f2b793d810d1975fca78ff4262f7c/zufot.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/vexepupuniga.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/95813834543.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/33231083238.pdfIn PDF document text
    • https://j-kowalewski.pl/uploads/userfiles/files/gudawopamijapaloni.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdf9225570---zixusukizukukimulumikix.pdfIn PDF document text
    • http://bilcafe.it/userfiles/file/73094689371.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/datuzi.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd124c88ac---46899820366.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/790857b1800a701b462fd6fdadbd417a/nuxalajejedefusupu.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/amiviv.pdfIn PDF document text
    • https://olterus.com/contents//files/50138726730.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/sofapisilukiwidobixe.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608476c658873---tabinanilubali.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/36740609913.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=auriculares+sony+bluetooth+manualPDF 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_off0000bfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD2 18872 bytes
SHA-256: 611e255987cf6d542d969f5d85ef5bfdb8e02760812e3d14769d3881516aa17c
font_01_sfnt_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 10832 bytes
SHA-256: 39189dfd6859ee442edd790e4a3f29c28fa092d0a4c0641f4de50fad3c4303bd
font_02_sfnt_off000109d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1