Malicious PDF — malware analysis report

Static analysis result for SHA-256 d741143008d667e7…

MALICIOUS

PDF

106.8 KB Created: 2021-05-08 15:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 597c1c5aa09e01bd562fc8a98749fe29 SHA-1: cf3c2f8bd80ae8ae6dda405bb37d2240c688af6c SHA-256: d741143008d667e7c8da606b05ccd238ff957626747c27d004820fc27534785c
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate that the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9415

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 http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9ccd011a---nevofoxevuxinene.pdf In PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/j334rhbfgs6osk4gjleimf16b8/87356204147.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879ea0195eb---tagoxowi.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083490eb8267---7797008351.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/42017b3c3d4c9e6ef9663597662c7352/lobevuneruwamajuwedipe.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/740frujok3arb3c0nvn07n9u9f/70626737138.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/tru0m8egra1d0bfh0jd8nd9rdj/67772137457.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608953c0d798b---86715084671.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/acbf67c0a67f0e427e7f729fd310de3d/xuwulavokewonotufumisoz.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/4663614601.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/b1c06921aaaed5b899d24fbb05fbc039/21556650667.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/2oaoghp8uooev9p8ckag5pbok6/52906211211.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/fmfn2tsa57r6n7eklu3kpv9v43/jurafimolikinofo.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609093fe33103---sepaxokag.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/853ovda942r4l8fd112m2vf4eb/77089990776.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160809446ec84d---29416871723.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/04kd951icp19225fudrnlmh2on/fovonutuka.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9814b40c7ffc98902341b59f7bdd0c58/72035836821.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/wipitaniladegegasibuzuguk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=jsc+2018+marksheet+with+numberPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000162c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162C4 2980 bytes
SHA-256: 54286c762eb567aef610ba2dcd5ff1e2962bd3426718724b7f741070b4c46d4b
font_01_sfnt_off00016d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D63 5812 bytes
SHA-256: a3370c19fb0f71a1a4431c7b5cb53446b82bbbb0601121b2a9416c43f30a7c0f
font_02_sfnt_off00018120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18120 10880 bytes
SHA-256: 16ebd533cf1abc863dc0950ce2329ec7192e277479a31a22e6ac348fbc10e2ae