Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0928d809932e268…

MALICIOUS

PDF

84.0 KB Created: 2021-09-18 13:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a24b3feb381c399b695281009500a77d SHA-1: c008647101676b7d0552a7327b5d73b1bb832405 SHA-256: e0928d809932e268dcaf2dd686ed3cee5c6f4d7eb1c30622b277c008c1ece3e9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan distribution attempt. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of QR code lures further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://medvor.ru/uplcv?utm_term=how+to+hack+qr+code+of+wifi PDF link annotation
    • http://krzysztofmalec.pl/gfx/fck/file/70770685183.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144419ead553---13086323076.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/41821215078.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/15242632373.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109051645003785.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/loxapezuzorodefe.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161333d8bb4163---fafumikufibujotisob.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/19519967518.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/d4a691f4237025b60b1dd5dff4321872/54698544090.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/dekogevowuxilizuzipagiva.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/zigifuku.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210907_40DAF98EAA2A0C68.pdfIn PDF document text
    • http://otestmanager.com/club/data/userfiles/file/20210913133628.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///kiwitutopukisitifa.pdfIn PDF document text
    • https://swiz.eu/files/editor/39727331111.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/javexukukasasolikipoxob.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/wesoxugedi.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/9444215426.pdfIn PDF document text
    • http://aisne.proximeo.com/ckfinder/userfiles/files/60487258490.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/41294650441.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/94616645018.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/96676650595.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/87474052987.pdfIn PDF document text
    • https://vilus.cz/userfiles/file/nigizigu.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19417161153.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_off0000e3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 10572 bytes
SHA-256: 483807cc4642af6453384c4a2a4ad10f574afb9ece2bfcd5988bd75f2178b183
font_02_sfnt_off000113f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F4 17744 bytes
SHA-256: 9292ed867d36e7b4d6d92fc9546514c5c80715e742e669a21be46c8dd297336d

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