Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ceee07880bfb0c…

MALICIOUS

PDF

87.7 KB Created: 2021-08-11 21:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 695b237d4f4357949c71c23da8c03f28 SHA-1: 89ac02d5fe33bde3c47ba830120785fccef279e2 SHA-256: 48ceee07880bfb0c63f84d0540c336205da5e1eb67a00456e7ce1f241135b01f
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely part of this lure, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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
  • 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://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/le9n9fgo6cu3ef9uv2bp6sq62r/87799349428.pdf In PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc2bb10694---34795322582.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/5671b626ca517f77421b9b6088d289f8/19804744687.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da9e90f67b---jezipukane.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/xubedurakuwuwogibo.pdfIn PDF document text
    • http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/xoligix.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7ddd22e96---tolusesogaxiguno.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/mlptev7hte1len6a47dhn1di17/45255492580.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/pemufesesoduwoz.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/gamedoleririjivibeke.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/judoza.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/36863741136.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/798376804f21490985c2bb76ecba6563/pitobutifipasuwuvajawun.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f99828f0bed---88985966500.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbce178a70---94312065779.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/20d09229188f5585f70153e0ed56c6cb/31787442681.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/peluluvav.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df0ac6dffc---94843096720.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/976644981.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/wufufiduxavagilupigilasum.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b56333fc9---87050255230.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21ae84d225---73117907222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+end+a+program+scriptPDF 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_off0000ec42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC42 10888 bytes
SHA-256: 745e68c63df882e9b6e062e503f8b2b9a31538713497c656624e30ee38d354af
font_01_sfnt_off00010541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 19036 bytes
SHA-256: bed1afd8c172a26ae7bcc056e495dab586e5535234def63fafdc5f3d08e68559
font_02_sfnt_off000137d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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