Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecad9a6133f239d1…

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 16:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f1ef927f466994b616e4a9d9dd6fe135 SHA-1: 72f75ca2f71fd5aeaa980fe2fde4281a7587c442 SHA-256: ecad9a6133f239d18f23ca5949e3b178cf6f02c0b4dfb77da244fcc13ff21381
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and heuristics point towards a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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 http://vetportonaccio.it/userfiles/files/46777638742.pdf In PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/febalumolodozagurav.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/49768973649.pdfIn PDF document text
    • http://vodova51-53.cz/files/vupekisitasivupenidunis.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/23917494110.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/gidewatixe.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/ronowuwira.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/98732684490.pdfIn PDF document text
    • http://guowangcable.com/d/files/37260838445.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/nozonebogom.pdfIn PDF document text
    • https://langumeistras.lt/i/File/60390096240.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/0e85e44f6996ee26f557b7e8a4afe69b/49280335671.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/2314353111.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/47455186393.pdfIn PDF document text
    • http://nadafashionbelt.com/Uploads/file/34580550011.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/kerefumidodikejomoma.pdfIn PDF document text
    • http://wych123.com/upload/files/97191180149.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/funowokojuvodijij.pdfIn PDF document text
    • http://ljsmelt.com/upload/files/57301510376.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/jogegimupijat.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/bowodubimosizi.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/garuf.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/480969fb219a88e5267f524c55ab17f0/11565987279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=lucky+patcher+apk+all+versionPDF 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_off0000d8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 16832 bytes
SHA-256: 2e20e80c31558718c2a87567b702a3d93d19d044c234f2e35d85354ecae5bf36
font_02_sfnt_off00011c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C50 10800 bytes
SHA-256: ff20ce92c8ad786332cbc0347641b296d77db4a17ee383b483821e2c2efaf2a2

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