Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5289995a769c39…

MALICIOUS

PDF

85.7 KB Created: 2021-09-15 14:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f2f421e1c862d801d6900858d1e6caee SHA-1: 25ab143c7d2686da54e081a42001a5d513c15bcd SHA-256: 1e5289995a769c39550d50cc461e8e1938ac2f6ca1d250155f7b3b383d582caa
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised or disposable hosting. These links likely serve as lures to direct users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://ondamarinarest.com/upload/files/27292957580.pdf In PDF document text
    • http://ahcxdq.com/uploads/file/081253559684.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/65137563110.pdfIn PDF document text
    • http://immopolignano.lu/images/gawosavolixibekewobotak.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/bijinodexox.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/sopavuka.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/99057227622.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e7c6f2560---35313345435.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/zaxojutilapulogomi.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130bfe42f657---gelarowunoxepaxibike.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16132e2be8c1e3---43082311134.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/18230557676.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/57618301979.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/4296414845.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/dukovewalisusana.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/kijarujatepaxiwon.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/73517397521.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/fuduja.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/pevatotevofupokoxi.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/bef363fbffd2b11b164ddf3973d93c93/lawipidokigumufut.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/loboz.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/89618606765.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/ravulipafox.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e672aea3ac---13871030620.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/54854000319.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/fcd77569e3ff5b106046a193e7c087ee/98865426237.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=appcompat+library+android+studioPDF 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_off0000eb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB59 10880 bytes
SHA-256: d875217d1d6a36089bb91af64ac12dfea24b592558aa4be23a6014739935ec62
font_01_sfnt_off00010444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10444 17040 bytes
SHA-256: 6e26eb54a9d738e931d9adb584f4aa339555bfde60dd971d7244f8a758015f73
font_02_sfnt_off000130ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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