Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c117f68587e3a64…

MALICIOUS

PDF

88.5 KB Created: 2021-07-04 04:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 384aac678c2c8eb7e7c32cb8845686cf SHA-1: a6489fd5033094026b6fb1b8fbffaae2598ca5f1 SHA-256: 0c117f68587e3a64f011ae380e1bff22b275749f3f1acf4750a24db3de2ad020
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs are present, some hosted on compromised CMS uploads, suggesting an attempt to redirect users to potentially malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/55ce539736e79bc0b56fa84bfa891648/nuxepoduzuv.pdf In PDF document text
    • http://rollfactorytogo.com/uploads/files/93039370642.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/p70h70teo0fvvoi8biqf1umhf4/81716523649.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075793ed471f---palufowifoxuwegusuz.pdfIn PDF document text
    • http://hkacca.com/userfiles/vefutotutib.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/kifibaziro.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/29bea4961dcf7417fa620ed9d3601025/9805631223.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16086891019801---39279055768.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/49032237375.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba007639d69---37630914116.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/dd1f0f80ccd5bde131cff2cded84bbe7/26396669301.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/e10d3605ca9073b55f3d2d78abcafa1d/tedoravanifoludimo.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/68684148837.pdfIn PDF document text
    • http://nensi.si/upload/file/wedulizuvuwelinonuvat.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/17434473746.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/zijiwoxefuluxaxiwatelosa.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/davazuro.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/7sc7v5fr1t6tiffcfh33g8jfsr/zegaxoromar.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16088763cc81f8---35056292610.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16093a3bc240f5---rugekiribebimados.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/15301422207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=easy+car+quiz+with+answersPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0dab97cc8e---lekelijupebi.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_off0000f740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF740 10648 bytes
SHA-256: 78cd880934c16eafa3f2031467167e84b9e5b582ee9a096b0a7414ef1fa8de59
font_01_sfnt_off00010fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB4 17252 bytes
SHA-256: 17a5e59ad50a69cc6169660aafbf3166983ca9a3e3c25a3a6c6546e5fa076397
font_02_sfnt_off00013cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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