Malicious PDF — malware analysis report

Static analysis result for SHA-256 2800e651e8690862…

MALICIOUS

PDF

72.2 KB Created: 2021-09-06 15:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bc6261cd602bf43f6ecf98e48602a38a SHA-1: aa10c3b0fd983387102cb9d9f5595350713249ed SHA-256: 2800e651e8690862ee0ec1c0403c4d9ec2c7e0fb9d89b2a02663d978b63f233d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or 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 0.9956

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://thewellmanteam.com/userfiles/files/fawovolusatimagizabej.pdf In PDF document text
    • https://celebicatering.com/upload/ckfinder/files/mabisipilizilulosepule.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098945d4ba66---45507355046.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/62037660846.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/f31692f8111b450ae30ca655107121a8/35826931845.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/medesamubitavajo.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/mowafafa.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/38857218677.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/rejulenumupepanolepalabow.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/tudawera.pdfIn PDF document text
    • http://cintabogor.com/Uploads/userfiles/files/78392914955.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e162896d820---jegalizupofosawozojuxisi.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160eff22911c7e---56824770212.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/3efd12f751ea494e3271275650ba3cf0/26187543466.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/jinenajedavobidisazefuv.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/57754447713.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/22599073752.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/62857219135.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/585fddfa42d8e7d911a81a465d375fdf/nagejejul.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792feacfa10---5036208266.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/84127281593.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/gevipudamadojadir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=nissan+sentra+2014+manual+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb66c6b1a75---lobawitinejapuj.pdfIn PDF document text
    • 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_off0000b989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB989 10988 bytes
SHA-256: dd5ae1c8029feda101eef12e2ad567b6c9166e231b83c230fecd54b3b4db30a5
font_01_sfnt_off0000d323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD323 15716 bytes
SHA-256: 5ed61e44a042d469f05f80d555aa94880031705f2f6f70dc0ad8385fc6c85bb3
font_02_sfnt_off0000fb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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