Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ece78eb3d12c6ba…

MALICIOUS

PDF

72.0 KB Created: 2021-07-31 15:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 49097564ace35041bb5af02020d5d5b6 SHA-1: ec54f666a32e22265747289ee950d0b0a827f8ef SHA-256: 9ece78eb3d12c6ba8c8b695393f2eaedbc8dad9f804dd27609589bf2e2e8f9d1
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links, many pointing to compromised WordPress sites that host other PDF files. This suggests a link farm designed to redirect users to malicious content, likely for phishing or to download further malware. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3533

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://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608245ef746cd---39724530412.pdf In PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160779d76f1f92---nusozaromi.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/89dk12n0k1s8rvk67jtlak3bnq/97537585069.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/nlas4lmufee44u5clmm3sg3ek1/2487718231.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/dobilabuforuzo.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/77560336045.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ac7da993f---xesod.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/siduwokewomewok.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f886ebba0c---72792921422.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/46133476445.pdfIn PDF document text
    • http://richfield1960.com/clients/865265/File/gutalusorizas.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/26777207848.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/tetivozogepibojedubogeke.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/f8e6727daa8f62dc9e730903f41f59c0/67233499615.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ca8369e7710cb202df51720d603b3f28/20714561495.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160862777821c7---83455788317.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/xupebikiloku.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/6610049771.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/19560502573.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/zufagatigopowiforifadi.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a640d6b85c3---biruxunefalikeverimejow.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/33791083301.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c29b392c---71683551549.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/1535711355.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e9bf8c570---40188513632.pdfIn PDF document text
    • http://bud-med.eu/userfiles/file/vajopo.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/6nammv3alqesti6dla7rnbno0e/71504587325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=tiro+vertical+hacia+arriba+formulasPDF 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_off0000d875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD875 17496 bytes
SHA-256: 569fed01e3a453dbd468d3377bdc2423b77661d4f377734bfc4ca01d68da999a
font_01_sfnt_off00010495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10495 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1