Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d48dd8467780473…

MALICIOUS

PDF

79.2 KB Created: 2021-08-23 10:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9480110bdcc63de155019eacbe182fcf SHA-1: 014972b788df0af1c8f90c8fd3d2b6fa456eb7fd SHA-256: 0d48dd84677804731093ad5b8202a71b416cab9209e12f9ca99a2bad44804ebc
156 Risk Score

Malware Insights

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

The file is a PDF that contains numerous links to external websites, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of link farms and compromised CMS uploads suggests an attempt to obscure the true malicious destination or leverage legitimate-looking infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/9pgj1va00di32e8f8t5j9bavql/44342625794.pdf In PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/97247725571.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089f5b8ee1f7---84404539631.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089374cc18e3---38048451184.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/66227527143.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/lowulimifufodoxopijibigu.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/rajuzadirovukagitezez.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/25573343991.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/gexekorozareketiv.pdfIn PDF document text
    • https://semangkamerah.com/contents/files/wobowikufixanurid.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/4pgg6valacuq1ogmq5qtiif1v7/85501025929.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/17948470478.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/92154470475.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e904d490466---63469129763.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/kugewaz.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com//app/webroot/uploads/ckuploads/files/60699848806.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/55a322ae91a3e9f25457a293c40da2be/52301038347.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/figagagekufefuzope.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/53d917d089279f4335228e20b1433b02/56037811905.pdfIn PDF document text
    • http://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/38634717580.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/pidalewuwuruxamujis.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/a7cc3f62018fbc6dd8aeb1685374822c/witizil.pdfIn PDF document text
    • http://blgjad.com/upload/files/kemirabatunagosawitizij.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/woxipoguvaposokagasaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=endocrine+system+physiology+lab+answersPDF 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_off0000cee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE2 17308 bytes
SHA-256: 712980167ba705ad5cf42838f803e521f46ba05d581ddf9fb7c35a48a0e208ce
font_01_sfnt_off0000fbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E9 11284 bytes
SHA-256: 8f828676e317f89daea5788c1cf1ecd7b8582773ecc51b8b77cfe505ecf2caa1

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