Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd2c8cb7d2c20e3…

MALICIOUS

PDF

82.1 KB Created: 2021-09-06 17:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b00fdc7abe0dca3d13668f6fa5fb97fa SHA-1: 59c2c259fc75a4e5cd0cf1aab75094485d375b60 SHA-256: 9fd2c8cb7d2c20e3efbef5a955d3c1cad5196991f61dd24e9696b73442aecb8c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely intended to lure users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest a coordinated effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0a1b96dcc---9114729410.pdf In PDF document text
    • http://vitanova-cattery.com/upload/file/32053673062.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/20940915895.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210727104125.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/setupojutaxotowo.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918942668cb---7241646582.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/57459026554.pdfIn PDF document text
    • https://ibexquimica.com.br/ckfinder/userfiles/files/77887379704.pdfIn PDF document text
    • http://dominoliberec.eu/images/file/files/49882308983.pdfIn PDF document text
    • https://securitydm.net/slicice/file/timakirobeteg.pdfIn PDF document text
    • http://cpils.com/userfiles/file/vewaxebo.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/99093901966.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b3610b31e---molerawoguduweza.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/7275785528.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/29698010076.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff5bbc475c5---forodegetepurikirixel.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/paxekuvinefinukiwavek.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160824dd705c8d---dawovoxizi.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/86115346584.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/67935314461.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/36951404971.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/41e2de9910e7f43a7b427edb0731b9cd/91121853839.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/gogogujogatuv.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b31e7c1de---58162588985.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=stawiam+na+tolka+banana+pdfPDF 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_off0000d409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD409 10652 bytes
SHA-256: 4e861b916fc26ad66f17c9f36f44cc63f99538c12a36df821292d5b8da02d6d3
font_01_sfnt_off0000ec2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2B 20904 bytes
SHA-256: a49d2f9b1bdedf9b3e9e67200126270983d60fa5bbcca112b69419e88f187891
font_02_sfnt_off00012184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12184 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1