Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6665dc249cc19ef…

MALICIOUS

PDF

64.0 KB Created: 2021-09-08 18:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2f256873a197cfd3f8e0b35b363d7c99 SHA-1: 669a68d4fd7f2053364fa590e626311e8671f892 SHA-256: b6665dc249cc19ef9d05410bedaded35d599ff7d567e7ec3d0352d9c9088e8b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external URIs, with several pointing to compromised WordPress upload storage and disposable hosting. The embedded URLs suggest a phishing or malware distribution scheme, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7025

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://bankerz.in/qpic/files/36100335320.pdf In PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/54265613562.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/94691814281.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/98215971416.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613518982874d---36545200788.pdfIn PDF document text
    • http://furniture83.com/upload/files/sifopop.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/90758619225.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337a9787c26---2699087049.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/laloji.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c845bd6c1---sumalopobomakoligunif.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/68796588997.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/48637458426.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/37561984935.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/lopelogakoba.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/ea516dafa78a7efd2be616ffbee4462f/fuxijipigipajefenanoneko.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/futebisobogasuvuderufa.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/12849847886.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/71260613179.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342819e2175---46304850585.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/44085041539.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/39566525421.pdfIn PDF document text
    • http://mega.kz/media/upload/files/limedobuzijonazumi.pdfIn PDF document text
    • http://belovosushi.ru/files/90216887760.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/wetare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=emergency+action+plan+pdfPDF 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_off0000e691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE691 10892 bytes
SHA-256: 12603912807c3c145e0f4e550acd4112c66703489c2cc15ce5e91f911c83dc43

Open this report in the interactive analyzer, or submit your own file for analysis.