Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb40e7f2cfd92e3e…

MALICIOUS

PDF

119.3 KB Created: 2021-09-03 14:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d1afc00f77e615339f17400593435f0f SHA-1: e2d02c41a593998b3d7d44f640ae6b252f3ff1e6 SHA-256: eb40e7f2cfd92e3e07929228e5d31bb51f783701de2697f6ee050a93bee60d98
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting. The ClamAV detection and heuristic firings indicate this is a phishing or trojan distribution attempt. The document's purpose is to lure users into clicking these links, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4126

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://twozonechickenlasvegas.com/uploads/files/79357817271.pdf In PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/a1a42272dd951b0811d1babf81f9225a/galojokuriwefasode.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/47868100030.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610d37bc9375e---tepiralusikemo.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/26863647363.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/0e3b1f8aa3ebe2e42f342c2b7e22aaf6/48455016745.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/h3bbgvuh5f0knootauflgs8u25/56396147383.pdfIn PDF document text
    • https://cahayamimpi1.com/contents/files/43157153133.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/xuwoxuvuponabojitoziko.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608631266ca7e---jewobewuvefen.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/62b1ba575767766e8e0634208dc44d21/75999354341.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/zugegekuvegibefurulumi.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/24504714320.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/37492982377.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/fibitowakolijeg.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/kojipojutamez.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bedf3643d---13206407873.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210723_09310CB2D9ECBC1E.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/mefopoboledi.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/53248011992.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d988b9a52---75276928211.pdfIn PDF document text
    • https://personnelcle.com/userfiles/file/givajatujefesitomupogosan.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/1158bee480658a84d3ac168581021321/96248266243.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=teledyne+isco+combiflash+manualPDF link annotation
    • 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_off0001754b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1754B 20436 bytes
SHA-256: f1647e2e4e5ea0396607d10d8a50da0d5f7c3cce21e6647c23c5e6578b38d2e2
font_01_sfnt_off0001aac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2DD 10860 bytes
SHA-256: 153bb0eb5735074d0a53cc6e1cb931603b3491a3a52a449d0588fd5c1bfbb76d