Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e729b5f2faf374…

MALICIOUS

PDF

78.4 KB Created: 2021-08-19 06:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1696124feb6e080e28eb3dce42345b52 SHA-1: 122d816167efd3db2b3c42d87766932453f39287 SHA-256: d5e729b5f2faf37482ac6841141a39c286c1c6aaefa553114a9b46c4faa51e24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a link farm or redirection mechanism. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely using a lure related to free ebook downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/foqveuntc18v730ii250bvpm85/52718424332.pdf In PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b272e42f06bcb73e5b0cb49978428135/8400138509.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/23630554037.pdfIn PDF document text
    • https://www.casestilistas.es//ckfinder/userfiles/files/52313599261.pdfIn PDF document text
    • https://edgecs.com/documents/lisojixozafewanugebovaten.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/tigobobikotebor.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/55749304189.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/85274723434.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/ed1337c91835245a78e99390af19d416/7942564534.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/lri89h62lnk0thtn9n9d532sb4/23754209404.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/juninepedixil.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/4e5d55b0c15725422696daf60f5d54a4/68697297872.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/28928121315.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/11640794064.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/belovabuxufiwosazebera.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/c633142c1c77978f5dae6791941b04b0/88116338362.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/2k1tafn5k4do2ioaatl6i6l1mv/wulopugopabukof.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/b6q1cibbb4muk1vbbo7u29ru0q/6763458868.pdfIn PDF document text
    • http://askort.pl/Upload/file/86420320130.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/90955154296.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/jiwugajolidotifo.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/effebaf61afe69e1fe87e3532175ed0f/lajovomelekaborijew.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/11418378141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=wings+of+fire+free+pdf+ebook+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E7 10888 bytes
SHA-256: 3c7d9c2cf2f98950d5f6f6d061d23030558c003e69f7cbdeb588fe1767de13ac
font_01_sfnt_off0000e9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 16128 bytes
SHA-256: b5eb7a3727dd4610f33c5331056df8bd5b55675ecb01fa9b0c33a58493d14045
font_02_sfnt_off0001139e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.