Malicious PDF — malware analysis report

Static analysis result for SHA-256 9371ca3fe0c5837a…

MALICIOUS

PDF

77.7 KB Created: 2021-09-18 09:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ecab004ed7e2247503d296144234da79 SHA-1: 1d3874c4e1a6a0297cf37a3745e7addedfc35c05 SHA-256: 9371ca3fe0c5837a2b8dd1d0af01b1b2ec4b828f9e688b9267a714a36e37d848
124 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, several of which point to compromised WordPress upload directories. The ClamAV detection 'Pdf.Phishing.Trojan' further indicates malicious intent. The primary function appears to be directing users to potentially malicious or compromised websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3684

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/v6k1mg25a4274vg5rmq08o3rr6/7576568323.pdf In PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371d8aceaeb---dakiguz.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/31638212256.pdfIn PDF document text
    • http://vet-spb.com/userfiles/file/jonoboziguwo.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/g6d2nmghq9qad7g02ii8bh2etb/tivaxuramapuzisij.pdfIn PDF document text
    • https://camelcarpet.org/d/files/4166921258.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/dekomulagugezes.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/gipiwajo.pdfIn PDF document text
    • https://gornjastubica.hr/files/45662312421.pdfIn PDF document text
    • https://kamwalibais.com/userfiles/file/79431967190.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/18999419579.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/tovesuwirujapite.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143bd67c074d---14204655764.pdfIn PDF document text
    • https://rintrans.com/files/xifogobifutujomakeduxaku.pdfIn PDF document text
    • https://rugsdirect4u.com/uploadedfiles/file/37284227131.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/neravifitabepezu.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/gurerewunijigapaxepi.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/30580150487.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/45215224786.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/71146074705.pdfIn PDF document text
    • https://limadelimon.com/images/file/61285729595.pdfIn PDF document text
    • http://chinalabware.es/d/files/xenuvozuva.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/janamajuwipuvimi.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/87074791219.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613df40084428---32616256835.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/54291918251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=smw+rom+usaPDF 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_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 17952 bytes
SHA-256: 735866abe10bbb5bee21f7816e397e79663893ad0440ce0b6013967811f3bb34
font_01_sfnt_off0001119a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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