Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5bd0054cb09533…

MALICIOUS

PDF

74.8 KB Created: 2021-09-07 13:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7a5466acd5c1ffefe9aa6e1784e5e101 SHA-1: 75b352149f990c7a7269fdc677158c5dda2a7b58 SHA-256: 2c5bd0054cb095333fdd30d2949a80afaee5aab2219e1c7570e7b9508609dff2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were directly extracted, the structure and URL patterns suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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
  • 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
  • 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://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfae924c0d8---14022513286.pdf In PDF document text
    • http://nccutrackandfieldnation.com/clients/2/2c/2cea5a7e730406ee40dfbbde6098010c/File/9203358033.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/44361924374.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/pigurobedirezetuvuz.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16082987f4dfa0---63292286950.pdfIn PDF document text
    • https://ewt.cz/res/file/powetotoretuku.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/rolerabigowetawobi.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d99fbff9db4154f27c82b65f155b3b54/22431010979.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/92198338430.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8d0fc56d8---57695439662.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1610d7bdf40bc7---sulideginafuwegi.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/setevazozijizidoso.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9353d6d65---zigapux.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ropiribiruxagemabevanimo.pdfIn PDF document text
    • http://tatnhapkhau.com/ckfinder/userfiles/files/jezeta.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/81460279641.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/kusovufuzumafelik.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/72496830568.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/7bd3427ca8035bb5b6a7556016cd2048/dedikidanulanizalobiv.pdfIn PDF document text
    • http://arucax.am/user_images/file/momulalasadudamopuzono.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/kepikimesofasamerufagut.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a17fd9f59---vutadojudiwer.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/sasejuvasu.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795cca80961---64872344066.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=morfologi+microsporum+canis+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5D 17992 bytes
SHA-256: 2e3df24a9faf0996b8698c660c8494929b6a4f43d535e4887e348e1e13a93f42