Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ea61ba6584d8a3…

MALICIOUS

PDF

69.1 KB Created: 2021-09-26 05:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 61e913dd6ddac09da5c0fb20a5555dcf SHA-1: 8468fbcae52b383b917ffff575251b7446507053 SHA-256: 95ea61ba6584d8a308b82683e2c262f7babc6b166d2ceb4ba5e92412f81f624f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, likely involving JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://jnejendomsdrift.dk/userfiles/file/tizedo.pdf In PDF document text
    • https://satellietgroep.nl/userfiles/files/matixotudokigivigojog.pdfIn PDF document text
    • http://reichspfarrer.sk/file/73402266538.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210905232648015.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/digotuzoxexilofek.pdfIn PDF document text
    • http://thegioioto.store/upload/files/vorasosupufezasakotanuba.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/96149206962.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/vopijemova.pdfIn PDF document text
    • http://origo.ws/userfiles/file/majezowanidoserijat.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16145429d4915d---birufewifuluwikatofurimow.pdfIn PDF document text
    • http://robedecreateur.com/img/files/jimij.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/depopufimibufotim.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/36220060292.pdfIn PDF document text
    • http://ubest.ru/images/file/95737613319.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/42856774212.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/lewupedudoxijixeji.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/14214670148.pdfIn PDF document text
    • http://julianina.de/upload/file/futogorafavanikaboboki.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/42290542181.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/juxobituwideniverusaxe.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/basarisopafekakuvepom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=tech+nukti+app+downloadPDF 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_off0000ad60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD60 10584 bytes
SHA-256: a7f0a5caeac6c76f36efe6d95a9ff985cdec7c09709eb3c28db1d824a5361740
font_01_sfnt_off0000c587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC587 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 16648 bytes
SHA-256: f436b4670c472d855eb0d7260e05bbb99ba7e62801ac06e70f1dcbcfe5775ac0

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