Malicious PDF — malware analysis report

Static analysis result for SHA-256 340f1ad50328d900…

MALICIOUS

PDF

96.4 KB Created: 2021-10-07 16:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: fca9c39bee6f66a46f3827bfe06e7890 SHA-1: 696ab79d73b0454ee78dc85f69308d3743901032 SHA-256: 340f1ad50328d90081d820faba6da99e9208bfbce67410c4d3478486bed1afc5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for delivering malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a trojan. The embedded JavaScript is likely responsible for redirecting the user to one of the numerous suspicious URLs found in the document, such as https://ketchas.ru/uplcv?utm_term=real+time+stock, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=real+time+stock PDF link annotation
    • https://123natura.com/stockages/files/26004261800.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/033cbf97da2614a41b114191f5733040/sazovesesaxifej.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/99060915810.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/fufut.pdfIn PDF document text
    • https://hujanuang.com/contents/files/1881086764.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16155ae3941ebf---rowelepo.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109222316592406.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/32712368867.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/aff3b5a2bd062b3343c8083fe105018b/dobajumokominizawakomovej.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/noziwujadofazonitogob.pdfIn PDF document text
    • https://nls.vn/upload/files/fuzukenidajonoxaku.pdfIn PDF document text
    • http://retailcop.ca/files/noruziwagigadetopetazof.pdfIn PDF document text
    • http://dsagco.com/Upload/file/lonukonabaju.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/18223103328.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/45369139048.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/sifuzovufarokukunomu.pdfIn PDF document text
    • http://amandamaitland.com/images/file/35676304705.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210918085102.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20211003090343183.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/6275276887.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/46037708988.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/xuvokufidajiwawupeg.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/dulomasovererobike.pdfIn PDF document text
    • http://kusistoconstruction.com/userfiles/file/5732066096.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/wepogugituwakuvivil.pdfIn PDF document text
    • https://tour-paris-guide.com/cite_imgs/file/12813837595.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/31092343561.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_off00010f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12726 20284 bytes
SHA-256: d9496632685c032ccd08511cde7347babbd9ec937f56023db1cdcb8442344ff1
font_02_sfnt_off00015ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA4 10324 bytes
SHA-256: 43e44c1a559efce846782673bfae1ed5721a2e5da733bd7772b861ae1ee54867

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