Malicious PDF — malware analysis report

Static analysis result for SHA-256 654b2b595879126d…

MALICIOUS

PDF

62.2 KB Created: 2021-09-01 15:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 03f600e07b3bb2014d9ca001da994569 SHA-1: bcc9aa5aa06eebaa2a83195304ebf2427086a0be SHA-256: 654b2b595879126d88c3c2c4e08713407bed35dbc10731294ac15ff1ae628b1e
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4569

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://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9d1b0a50d---90659348712.pdf In PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a38035ad3---81786479594.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/bomajebojitamegoju.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/98591625286.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/dujuxepatepalubugibu.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf1657d19---bonixavemazejor.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/cd846c59bcc24d12cdd19befc55ac5c4/kanasogigetakan.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/43837715594.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/95743095302.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/92169873303.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/30052451323.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/putureke.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076e83533ac8---7760804054.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/juvokokax.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/89878020613.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794f57aa550---28011829528.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/9dqgkjln3d4j272ndrcht8a2c0/zifikutetoruvunakanix.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8cbce26b21af22c736d15d8c8ae7a0af/90310131855.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/somon.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093f3487bcfe---wiwotarefujobaladifef.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/8222789782d6366d8267ac048b52d80b/43679897706.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/31281692945.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/16982144353.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/jonujijevaxogizofi.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0465768cf8f71b6525460c2e16f90b76/8023293268.pdfIn PDF document text
    • http://usagimatur.com/files/others/nofojebona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=no+one+is+more+beautiful+than+you+quotesPDF 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_off0000beb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CF 10956 bytes
SHA-256: 5f82c3e5ca7529a2a3b56483b2eff708a7244fc3d87b3f96c22b10e4481b5c78