Malicious PDF — malware analysis report

Static analysis result for SHA-256 d047c0c80634ae90…

MALICIOUS

PDF

69.1 KB Created: 2021-09-25 04:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2a02cb9fbeb8dd61c620c4a610a9b457 SHA-1: 95bfb8f848f1b475b727a4f4e183e45a12702dea SHA-256: d047c0c80634ae90088400cf1bd1c6c45a2316c09ff313478039e235f8438481
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://myxroad.net/upload/userfiles/file///lugeguf.pdf In PDF document text
    • https://anbc31.iscriptscloud.com/app/webroot/files/file/vatigigaruwetuk.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/0c7b1dbd6de0210adc3e817fba1ffdc1/mibiritufekedobasorite.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/398834399.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614be6c334051---7861078037.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/89609208583.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/gipivawoxafobumike.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/19613285142.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/labofabuwemaketosajadati.pdfIn PDF document text
    • http://hrudolf.com/userfiles/78125775201.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/3561888847.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210913055609665.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/wunenilage.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/jiferosamogujuzed.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/40134215061.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/kaporowenoza.pdfIn PDF document text
    • http://albergocavour.com/userfiles/files/turakinaviponaxexowawa.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/83906294388.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/surasupigemopege.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/gamubuvivobakebiw.pdfIn PDF document text
    • http://zapatosperezcabrera.com/ckfinder/userfiles/files/benavuxefi.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/rumatikisovulaxegatowa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=kannada+movies+download+sites+listPDF 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_off0000b05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05F 15196 bytes
SHA-256: 4f5de605606ef58d7070d19702248b9f919042a030191ddce5f3b8140f8efc1b
font_01_sfnt_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 10452 bytes
SHA-256: c2e4f6a8c537246747c6f13df931bcd6f470f86c325cf1619845b821ddb81466
font_02_sfnt_off0000ee99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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