Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b15933b0d9ce2b1…

MALICIOUS

PDF

64.0 KB Created: 2021-07-06 08:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bb60678c673ce7bed62f6f4c25fce355 SHA-1: bf6d81d8886f09e602fa3f76964bf4d3315de668 SHA-256: 4b15933b0d9ce2b15f1dc5d12eff3deb8aa506def52860d92b34813fdd27bbe1
154 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malicious content. The presence of numerous links on potentially compromised CMS uploads suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8532

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://yunnanyingxiang.com/ckfinder/userfiles/files/rajutusakamo.pdf In PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d05e20177---nubidabip.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/kidijidalirelosapulo.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/c6eccd8300768b336c0c66cf80b4f867/53423723019.pdfIn PDF document text
    • http://www.radiooro.com.mx/media/images/uploads/files/73585435145.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d03007b55c---mubolaluzotadu.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c25f7746d5e---74758611589.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/2f0be5d0aeeae4cb7b356af6037dff47/14594711898.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/52050575702.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/lagamevemasakovun.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/ruzex.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c035ce47---dixudujozodorowonut.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/5203b15405562667f620b95dad29e063/vazojitixuxalumoxupibubek.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/b56cd6989d50c68f01d3c69084b557d1/32187412366.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/56862934821.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/14495424857.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/75f1fc3756b1ed550aa2b3ed49edb347/gipobumeruk.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079144285e69---73771804743.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/q9u07qlhagfl95spmosr7mum9l/lurixerabodajefezozitoso.pdfIn PDF document text
    • http://tecumseh1962.com/clients/85183/File/relabetadidipas.pdfIn PDF document text
    • http://0930actress.com/files/files/kafitali.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a6592f1c1---nenebaxi.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16088d7e4980ac---59341511979.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b161e86e9d4---wezusenexu.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/69440587847.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c567b80745---saburuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=breath+of+the+wild+all+shrines+mapPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40C 10904 bytes
SHA-256: adab98d5734e8cabcfb1ef5b62ac9402a84b490e6a6106ef52cdc3c8d3a37822