Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc60954a9e3136a…

MALICIOUS

PDF

86.9 KB Created: 2021-07-15 13:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ea389ae5880e30a5517390a566c1c6e8 SHA-1: 21adc8a6ffbe69b19d7f24bfc582d28ec53717f3 SHA-256: ffc60954a9e3136a69bf4c1055978049fd67b4a132f22a8bb1c839d5c496ed81
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues about its specific purpose beyond the presence of external URIs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pistant.ru/uplcv?utm_term=love+you+in+hebrew+language PDF link annotation
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/2o2s5ai2sd8mc0isur93mn4524/67790313788.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/90b944188fc5f2c02f345a6bcae7f762/jukejakibabujevoteno.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ab9041923---71208395633.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c325dd925fe---47349250107.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/tetawarogulajisixo.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/navizuwusuv.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609652beb3ee5---14977846303.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a92510a9df7---vesikitanineg.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160719adde897d---79296440544.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/jiwubigipufunukirove.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160e0ee7dbe6d9---tuduwagibamalowamo.pdfIn PDF document text
    • http://medi-sen.com/files/files/39360017991.pdfIn PDF document text
    • http://hasyo.net/files/file/wovusik.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/861b99017e021ee1b4181dc0198326a0/xudanexeregebuxezaw.pdfIn PDF document text
    • https://diphong.com/uploads/witazaro.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/99668675187.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec66a8c145---poxejif.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/xajizurezevajed.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/gilibiderapamag.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160750e1dacc38---86920477921.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608492e412099---jojararabusoginebosot.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/81997466077.pdfIn PDF document text
    • 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_off0000ef5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001076d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076D 17408 bytes
SHA-256: d28a7b3ac5fbc2a0f133279418e7569cad9c2009d7b0dceb6285d3bc6229803a
font_02_sfnt_off00013518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13518 10584 bytes
SHA-256: fca75132a86e4e350d61a7fb639c7b029a9f689274a89564efc42a8a0715f482

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