Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10e85dfd9c54829…

MALICIOUS

PDF

84.1 KB Created: 2021-09-05 14:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a0ec1b2d36c0621c33d5816dae873dbe SHA-1: ea8673cc0b26c5830108d728bb63a09f65fdef3d SHA-256: d10e85dfd9c548299e16c85c645d89ba435e9f87a19a0600778028028d65e705
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, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of numerous links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fullprotec.com/ckfinder/userfiles/files/1038435795.pdf In PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a92f5921c2d36bc9c1df9156c522c460/51692556436.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/daruzepulenuzag.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/24725978862.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/xumajulezepusavu.pdfIn PDF document text
    • http://oodow.cn/upload/file/210619085020606514j0w2upnjg73z.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843581b2c5c---44816206364.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/wenixuzusibudofaz.pdfIn PDF document text
    • http://transinfosoft.com/userfiles/file/zoluguviwokifanelufozipib.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/d3dbc7b6204748db65267eef3663a5af/47786209369.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16084809fcda0a---19061990843.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/8543698114.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/7e6b395e9512b23565fdcec058db8448/pusireludoxap.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/n6gmdm56h0aj53rh8ah2b38ho6/dewew.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/2ef9534cdefaf02b7ba4c1270fe09582/texabogukowofimutatigato.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/86904684700.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/48588905994.pdfIn PDF document text
    • http://poorclarescork.ie/images/77789718959.pdfIn PDF document text
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/45175174369.pdfIn PDF document text
    • http://sddshchb.com/userfiles/file/Fl202108031906569450.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89692111780.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/xizaxidixefujotipo.pdfIn PDF document text
    • http://hkwwta.org/userfiles/bazoxuwebifatu.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/6f5725ac7138ee1b4176b6b8c9fbda03/folaxizadifawiwotupes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=coding+for+dummies+2018+pdfPDF 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_off0000f755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF755 11168 bytes
SHA-256: 400b3ed04061dd9f85c293744fcef62aae78bc8a0bf479fb53ae91924ef063e4
font_01_sfnt_off00011144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11144 19300 bytes
SHA-256: 73984d7bdc1d5b8dd18460fd62aea443aa7bc43c3d8d1cd05b955449272ba8ed

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