Malicious PDF — malware analysis report

Static analysis result for SHA-256 417e69b8415b3c61…

MALICIOUS

PDF

84.2 KB Created: 2021-08-18 04:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1affed023342524f65f2f1e971fa52d4 SHA-1: 31fc2b627dda20a090660c18033d715d2675810b SHA-256: 417e69b8415b3c61b430d8985922c87218e312279f753e53bf060ec21c5a8d80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9376da9be---38474706960.pdf In PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/pvb1egpp2gutpduhe7fi2lnhl4/98125463935.pdfIn PDF document text
    • https://plasy.com/uploads/file/51818536707.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a92b97c0209---diditizukok.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/467ajgg0o9dm3occ8gs0ftorrq/64245614795.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c1835d279ba---xugeloponaronivusuli.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160d92e3ad06f8---lajavovagezatagotejiw.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e99c756fda---kigalawolisavikakili.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/15iqb22opdk8gfcolskmo2g6j7/gozezeri.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/23c3a9908f64af5137582b59afedde85/fanusukijo.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d41150027---71960719249.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/9r9663hq7g23vjkuj21ad4to4v/todifesed.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7ed6d4c29---jukewi.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/kuvetoladarumifom.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e9e8d4ea9dc50803b5ba2ae5cdf09977/35235396393.pdfIn PDF document text
    • http://earthtalismanjewelry.com/clients/b/b2/b27d4d76c51cd35ccef873a204118430/File/20691408328.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/7636771424.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/58581794287.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/bidevabatepisobaxesel.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1607e8b11---fenolefededaz.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062115290113.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210728_055848.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c98a5f834---16610539808.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/62551671850.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/83325992695.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/39973666535.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/madolutimulerujexoro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=imvu+credit+hack+2019+no+human+verificationPDF link annotation
    • https://imvucreditsgenerator.shutterfly.comIn 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_off0000e4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 11200 bytes
SHA-256: 7826078b5fe0339449b6f58dd4299e3fb5399ace94cc4a6f643d2f993d92fe03
font_02_sfnt_off000116ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116ED 16584 bytes
SHA-256: 042cff99b392c0ba5ce4a42100e288c941d590973d388cc9a284325caaa34256

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