Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbec5dee85e58cff…

MALICIOUS

PDF

80.0 KB Created: 2021-09-21 03:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 191d15200342842497f997297d5a06c4 SHA-1: 07015f5d1ff42c0f4ad3e87cf95e99443279549a SHA-256: dbec5dee85e58cff312f549087dd02538542bae3ca83a25c881182469bee1750
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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://parzenica-bialka.pl/userfiles/files/fatud.pdf In PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/53161678551.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/vegadog.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/75933861324.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16143d0063bf3d---zaxivavuladasatepi.pdfIn PDF document text
    • http://bangtaisay.com/uploads/userfiles/file/96384749853.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdce211ec5---robefo.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/78899784804.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/dinalobagafisunozipisinex.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/abf1590fdb45117d9b057c54070a27ee/fonupulomidomajeduredabaw.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/tivavifetekopuxuzikepad.pdfIn PDF document text
    • http://yhbinternational.com/userfiles/file/bipitalamukozituloxukolu.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/37148516288.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/lubodozuxej.pdfIn PDF document text
    • http://topp.pl/_topp/file/49152213143.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210912_152703.pdfIn PDF document text
    • http://araulmor.tel-cor.com/images/library/file/17224711293.pdfIn PDF document text
    • http://runo34.ru/attachments/file/manexewerolofolaleju.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/30887937727.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210909191735856002pw7ra.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/maxaresiwewe.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/jazewuwowaluxakel.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/matopipunasazafamegub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=70+inch+tv+price+in+pakistanPDF 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_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EA 18832 bytes
SHA-256: d8ea09a0f921135fca928543380d75bd5eace203d9342fc5c374652be8828540

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