Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e321faf0f8fcfa…

MALICIOUS

PDF

80.0 KB Created: 2021-09-08 04:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c14a60e46e64515e551bc7b4da0baf67 SHA-1: 9744b42d32cf330d2ce2ea2525c44730a6daf908 SHA-256: 95e321faf0f8fcfa1551aa194df5a0cc4299285af3f092dd7cbf1e54de91a9e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload storage locations and disposable hosting sites. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to lead users to phishing or malware distribution sites, likely exploiting a vulnerability or tricking users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://vladekoservis.ru/files/zifetota.pdf In PDF document text
    • https://samudra99.com/contents//files/lobesitetiligedatago.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/jn7q2au9bmknlvc0u7h0cofaa4/norolodumamup.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/7t2nrkkjhlpu2b7bamd75q1lel/99961641703.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/da30b5cfa7aeed874c22dea68503e519/zowebolijizapoziwu.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89170b1a6---poketakimevometigebose.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c5c8da6ff---84930842843.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/7180175668.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/28953409618.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f50e522ea---kuwegavi.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/99642776842.pdfIn PDF document text
    • http://juentai.com/userfiles/files/femaso.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/6497db0d27ce2fb3cba12a70f151ff3d/fuvajip.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/jemog.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/90375098806.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/6e173f56f912d386cdaa12c7a69a0a96/sirikisegigewerufujezekos.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/kegetijilepabobosop.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1612babbfbbcce---19052073248.pdfIn PDF document text
    • http://hidropro.hu/upload/vesaxijuj.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/jubemifupobanunet.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/nuxow.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/povexipaviruzebopewaga.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfb42a6191---5337115972.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/26843702254.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/notopolovoliwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=data+kuantitatif+dan+kualitatif+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_off0000dbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBC 15624 bytes
SHA-256: 916c2273d424414d127ad731e4698ea856dd54399ceae501ff84c73171d1e469
font_01_sfnt_off0001031e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 10164 bytes
SHA-256: f6c82e8134abf56909b89a794813c131870fb92112dc71a969fd20c5522cbdd6
font_02_sfnt_off000119f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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