Malicious PDF — malware analysis report

Static analysis result for SHA-256 07064caf0a98b809…

MALICIOUS

PDF

90.2 KB Created: 2021-09-05 14:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1535e27d606653623c00434dd4f87f51 SHA-1: 5971d5a581440b4bcfa802d673072578fdeea983 SHA-256: 07064caf0a98b8090c74fc1771f768964ce92ff5e841ab54c10210312426a930
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, 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 embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

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
font_02_sfnt_off0001431b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1431B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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