Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9acbeaa211401e…

MALICIOUS

PDF

78.9 KB Created: 2021-09-04 10:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a187e65d094e432dd8bc80b6af89338 SHA-1: 320a0628296d0af1ec54b8d5a377bdb274efc145 SHA-256: fe9acbeaa211401e188a5dd36dd9eb8ed8fc2b541657e327c80558477e1d0eca
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals it functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised or disposable. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using non-clustered, disposable hosting for link distribution, a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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 http://hasdeu.md/data/userfiles/files/matoxemabuvinunarogosa.pdf In PDF document text
    • http://ambulanceservice.pl/userfiles/file/70091666005.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/mevaxitax.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb78b61d00b---90462150448.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/sivebubeboja.pdfIn PDF document text
    • http://idcla.net/upload/files/tutetimemipexigowuwuse.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bb5bf38af---7869908895.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/fofazuxapolebupuja.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c45bc57575---muvovu.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/xexitixalifemam.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6620e54d7---xizigilubazido.pdfIn PDF document text
    • http://bruisedreedfoundation.org/clients/4/4d/4d9d7eec3bf3a09fa0457ace138f6a4e/File/zovimafideparupadanuzeku.pdfIn PDF document text
    • http://aimic.com/userfiles/file/favafasidi.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608244e8829bb---35970811794.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14a0c5ac19---kimufuvo.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0978d03a8---tekulu.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/xinamizape.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074fca416a87---gekitipibamomofosed.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084340a12d1e---20260330927.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/91986652530.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/hugun2jtomq31tt3fouedna8uf/57747085264.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+highly+sensitive+person+elaine+aron+pdf+downloadPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd71a4dcbf---runurizopevo.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/40490716007.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_off0000e4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC7 18956 bytes
SHA-256: 361b862119e827e860d1a8220c89dde124181ed1fdc18b251805caf2d1952c41