Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0410b35342de232…

MALICIOUS

PDF

112.3 KB Created: 2021-08-31 03:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e702ab3b0f55c954cc7ce9197194edbd SHA-1: 92775dc1fa47bd05b0c25b9ca25507736a9cd88f SHA-256: f0410b35342de232535af31d2586ea2ef676f84d07510398f1da3119fc8ffcfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to redirect users to malicious sites for phishing or malware delivery. The presence of multiple links on compromised CMS platforms indicates a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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 http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608714241c8e9---xazajir.pdf In PDF document text
    • http://flirdining.com/uploads/files/malite.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16098d1b5e32ee---kimib.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xukolodexufiwesexegut.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb262bbe98---88113544955.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/c51639c2e8cc8f56690e313c60470126/bufidarolibam.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/21521070542.pdfIn PDF document text
    • https://nadamasristorante.it/file/gatiremamevinixaw.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/78281798858.pdfIn PDF document text
    • http://venkateshservices.com/uploads/64208043172.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/34471975863.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/58399732993.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/98292738571.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/87467730516.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/fbff10b5fdc13912489ed5fddd37a887/gezepexig.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/d779bc0fab291fa6e729e9cf4279533f/gagodidanajigap.pdfIn PDF document text
    • http://stpatricksreunion.org/clients/84553/File/xupik.pdfIn PDF document text
    • http://szhlfz.net/upload/mofivijebijilobasujipuge.pdfIn PDF document text
    • http://udclassof1968.com/clients/74076/File/59630346589.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/duxuxuveketoj.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/b253e06790e28abf502a7695d1c1dc3d/ruraxiwipumeso.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607870681756f---jivorexoz.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/gifuwukizijegi.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a24c2059d24---18473352609.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/sapup.pdfIn PDF document text
    • http://thongthien.vn/upload/files/68882771395.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=red+onion+outbreakPDF 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_off00015604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15604 17472 bytes
SHA-256: 007cc3cfe9c6888670c9f1bfef43d61cb7dcd6b741cb44259d4d3cffd0bf0c75
font_01_sfnt_off000183c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183C7 10404 bytes
SHA-256: c08f7322b1f00850ed910c6faa17e38ab2ed92f662ad4c50c738508590322e38
font_02_sfnt_off00019b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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