Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f8877aa9956ec6…

MALICIOUS

PDF

73.4 KB Created: 2021-09-01 17:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0edda1badd7d3ab451cd134e9ab2f7a0 SHA-1: cb59f562f3c8af1366c0fa52d9a04f7b44ff3c0a SHA-256: d0f8877aa9956ec688636c712d311a8b5dc6282a6dfddefbd9f0e3c7aada8f77
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6658

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 https://irlanc.ru/uplcv?utm_term=installing+standing+seam+metal+roof+over+shingles PDF link annotation
    • https://hsse.cl/files/83579426024.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/2593372104.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/45544618824.pdfIn PDF document text
    • https://projetovm.com/uploads/files/11093556682.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/zogunutuna.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/b3616737d2791e4ea75aa7b422525301/wugamagapawugunawir.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/18143473658.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954523188c5---68201462720.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/lisulatirol.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089e300753e0---kamodumisukujosabatimun.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99a289a0a---veginesadojom.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/fuxefaxosetulaxanu.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/wuzogofotudifibutelug.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/lolifelusajozesilifan.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/kuzuzefubobisiso.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5eaa2db0f---31940283615.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/bfb90be2ed84d17322db3ebbd69e922f/47301123638.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10d1823cec---sirezigawofaresituxa.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/14550639271.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/pifopif.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/0e37bf276484bbdcd1f7aa6275c5ec5f/87728343658.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a978afaba---83124885722.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/tetufimasiburamuletetabez.pdfIn PDF document text
    • 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_off0000dd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD28 17048 bytes
SHA-256: 4017e77bfa656eb1d177f84bf8cc478b7ac6d11e0c2b131059e1683f343a5a0f
font_01_sfnt_off000108c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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