Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2848795db29dbae…

MALICIOUS

PDF

125.3 KB Created: 2021-07-01 21:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f81b311488b696aafce3f4e0c9a2f055 SHA-1: f88fe2e6a9fe9f5c0d37edf2b9011da2e8aea5f1 SHA-256: e2848795db29dbae0b2cf4d0a0e15163ea45317b459f670428f2d234568903e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised CMS upload storage, suggesting a phishing or malware distribution lure. The presence of multiple unknown URLs hosted on potentially disposable domains further supports this. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://campcolefamilyreunion.com/clients/82065/File/fidapopatamejipaj.pdf
    • http://modnyi-buket.ru/uploads/files/maserowowaxolilojoromap.pdf
    • http://humanitool.ru/userfiles/file/ladojekiwuzozolire.pdf
    • https://bustotoronto.com/userfiles/file/11947308888.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703ebf2b75b---dekinepik.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b294ac27db---1881201832.pdf
    • https://pmms-online.com/assets/file/fufasasilefibinabi.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/97d9c7d93ccffbc5f08a9d5548902d67/66124832044.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e2d30d71832370db25a07b53b134bfe7/jerutovu.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/mglo2mm65dagu600pdhrvmbc9h/62231892802.pdf
    • http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/33568753681.pdf
    • http://ankaser.com/userfiles/file/juvoxitosaropufogokome.pdf
    • https://dollarplus98.com/images/upload/files/dawuzuluvigerufexebatujis.pdf
    • https://adepotcustom.com/UploadFiles/file/20210501100918132.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160739a23a7e0e---15826278182.pdf
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021053109342380554.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/5792301b3fdf8088c35e6c838651edc8/64700981862.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/2d832434bfc80bf9addc28efc12dd79f/91526745396.pdf
    • http://flambotour.it/themes/userfiles//files/bosafefijuzixituxaze.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/e9641f701271fa5504ff26c9e19307ab/gitugewavozivemi.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e3c332091---madevubibuxugegubufoputo.pdf
    • http://analogsys.com/uploaded/file/17071981976097b09775320.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/1n4u58mbj2kvaljg2o1m0e13mm/26466560119.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608782014f745---wijutatuwuloxoneg.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=handbook+of+heating+ventilation+and+air+conditioning+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018870.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18870 16792 bytes
font_01_sfnt_off0001a082.bin
3e01345dc391ac25045a002b452f2f3f1e4590fc157179252d0511737fc3b0ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A082 17296 bytes
font_02_sfnt_off0001cdf0.bin
0717066b8b1d007912112c16bb5e4597cb7cd823dc287fcf027d6608bb4f67e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDF0 11020 bytes