Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bccaebf55b63110…

MALICIOUS

PDF

99.3 KB Created: 2021-09-02 13:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 54d98fdb8c1df948532e943f940c33e4 SHA-1: a8afe45e5d04f246444adda66fb17bc49686a27b SHA-256: 7bccaebf55b631102d1a23d3ec9a7349d0e2451c3aea797dfc7e974c303898f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The document's structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://krajinar.cz/soubory/files/xadexutipekavumefejomi.pdf In PDF document text
    • http://donateagift.eu/userfiles/file/mezin.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b244c76ba---leronag.pdfIn PDF document text
    • https://healthcareadvisorsgroup.com/wp-content/plugins/super-forms/uploads/php/files/el752347o7kmho4p9mbs1df5t6/76117461749.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/burisukokufavokojojon.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/24874991423.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/70904111424.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/xetiwowudutebosavaxovo.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/keriwelukitekiz.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/82884782377.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/pilazisubozuxedud.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/miwemazezotogavamapedur.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105ee34b4345---87059719172.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d380972c49---tazeboxobaxiniwukaguw.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e3dbc34452b---solevi.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/31ce4dca4ba18a0a305ffa112c627973/21280943164.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d46333e4cc0---kuwuriv.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/megogovukedufebir.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/38947225377.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16091e6525c211---sinarevodux.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/rupakimozakevelixokujit.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/1qeuuohdiigh49970jhhsp2td1/55139482710.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=after+book+3+online+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

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_off000120ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000138ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FF 18220 bytes
SHA-256: 35bc0f71df99e5a50266a84b75e2c200434d511716c0a7c19013290c74aa9b06
font_02_sfnt_off000167d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167D9 10548 bytes
SHA-256: c24f790acd7877083c0c0ec759fc37c8591f898e5213b737e2fd0f4caf8152ae

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