Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce706ec5d856a3a…

MALICIOUS

PDF

59.1 KB Created: 2021-09-18 13:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 584221b82c05ce9b8e52018df8098f24 SHA-1: bc020db87db6ff510600626cdb01602108dfd9cc SHA-256: 7ce706ec5d856a3afd13888df6232ed5b8df37d2f185cd6c46dfea2607974b81
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. It contains numerous embedded URLs that form a link farm, pointing to various domains, some of which are hosted on compromised CMS platforms. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8037

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://chcial.ru/uplcv?utm_term=android+apps+source+code+download+zip PDF link annotation
    • http://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/85889289206.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/xumipam.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/74089452592.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ab7002475---gozinevuzevejexowotare.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/38893368303.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/matesurivavivora.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/luvelemulosisawel.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/31487492633.pdfIn PDF document text
    • http://airsoft1.ro/files/file/bifibebobutenolet.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/9aug8fduij39ej6t1ct6p1g2o8/80425594626.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fea5a4d37e---vilifetopowum.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/bezinezoti.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/19561516816.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64997465555.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/1748598354.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/mutelovimajezaja.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/62056268673.pdfIn PDF document text
    • http://gyliver.ru/files/files/35698913522.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/11839297410.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/30853171594.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/9859968344.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/fetufofiduza.pdfIn PDF document text
    • 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_off0000c50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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