Malicious PDF — malware analysis report

Static analysis result for SHA-256 7449f08dbebff6ee…

MALICIOUS

PDF

93.1 KB Created: 2021-08-08 09:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f2f34c6c809248bcb1a784f05fa6ab54 SHA-1: d4ed73cbc73f0785b2eb5b7ac8e00208d2606aa2 SHA-256: 7449f08dbebff6ee844c0acaadefc1165724e18c1a42383d8a73ffbdcfa08efd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/fab7a4ce710e55022a0f22400a516212/jetisijef.pdf In PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e258f0ff0c---podupexitili.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68443092c6---vebuboverisovet.pdfIn PDF document text
    • https://isleo.com/i_photos/file/xokalog.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/64408365743.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/1542476847.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/7070a4283a2c0a8da0c8dd865f4a0280/zilixixewemapajexebiva.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/5022859572.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/fuzemawe.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/34023738059.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/3317da74770a14d972396a31ac635717/lopevupavarun.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/wanoxo.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/4qtfcggvmsj6003j338sen8u77/88550893627.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/2723262376.pdfIn PDF document text
    • https://airshow-bg.com/file/35383876590.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d703f4db777d63ac7ef041a6f6982cf2/xesuzulukuxekulu.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/24r9ieqrs2ies4uul7726fs023/60279591771.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/wududofirezuresitalo.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/79713981993.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/71037118330.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076cd587d02c---97566765592.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/fixorefumevak.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c503b1e18---9814913204.pdfIn PDF document text
    • https://digicpictures.com/downloads/9318705747.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210715/2212335462.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e1661ebdb---65279648307.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/wopevamobugunubi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+write+an+analytical+essay+on+a+bookPDF 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_off00010b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001231d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231D 16488 bytes
SHA-256: 799ebb0da323aa58127948d2d720dd578f0b4995b551d18b25f9d6d731b58196
font_02_sfnt_off00014df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF8 10644 bytes
SHA-256: af049d9363c0acc6610285ea00c14db1361315eb37c81f720aaf934fc863753b