Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f69832d74b980f…

MALICIOUS

PDF

70.5 KB Created: 2021-09-17 01:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7c9b78876bf7b4f762e314d5353ad1c0 SHA-1: c7640ba8e023e886c04295405b2f5498afe14aa7 SHA-256: 67f69832d74b980fad65a1f7a06497a60ad4a341a442f2fd92ee171d0873e087
174 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan distribution attempt. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely using Spearphishing Attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5338

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/d67f4ad0c16cb4d1e81b4adb91895a59/59562590965.pdf In PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/xerafenojejek.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/xaritaposabat.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/posaxezabarodukikokavurek.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f2ed1d488---madomopowilubug.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/60385342088.pdfIn PDF document text
    • https://langumeistras.lt/i/File/21621139409.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/3944437099.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/wopimope.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/37933041423.pdfIn PDF document text
    • http://newshop.jp/archive/file/12422731722.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/78771576197.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/tizopasanuvudeguvepopuk.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff00066b16---zewuji.pdfPDF link annotation
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612effe18af5a---fopaxinubesajupi.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/75849107484.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/97092688946.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/gubowufunamol.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/xifewebelalopotawizap.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/tugilomuzegen.pdfIn PDF document text
    • http://zatacorp.com/upload/files/fuzediseropeg.pdfIn PDF document text
    • http://cbafjvn.com/uploads/userfiles/file/rufofedusesipufanewikep.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/mamowigufol.pdfIn PDF document text
    • https://panelshock.com/userfiles/file/93308270577.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/94123141810.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/jeniwipopifawekiru.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ffa093ad6---nomafevubaledudemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=battery+saver+usePDF 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_off0000d958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD958 17544 bytes
SHA-256: 09391f472f507fe7a0ea847a00d7333c026e66aec05184a1d0c1a05b231ff09b
font_01_sfnt_off000106d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1