Malicious PDF — malware analysis report

Static analysis result for SHA-256 659c48469f87283a…

MALICIOUS

PDF

77.3 KB Created: 2021-09-19 09:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b245de03acfaa8c42ca14792e4abb7d2 SHA-1: 4aadff1a26fa5e9ff171c1f7ef7f345a45bc4a84 SHA-256: 659c48469f87283a8ab751bc99c6d14dfa46bcd02cc85fe5299d7bedb1b55447
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a URL related to 'gta 5 online free play download' indicates a lure to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://oniceh.ru/uplcv?utm_term=gta+5+online+free+play+download PDF link annotation
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/cfbf920138f67406862c50e547df70ab/79658705847.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/mokuvamovakutuzeluginap.pdfIn PDF document text
    • https://protrialse.eu/files/files/kupitarisenikulej.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/37336189836.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/042bd8ace26b60351c5b0a82d8702794/tuzoxosered.pdfIn PDF document text
    • http://texmet.pl/userimages/file/xodorurepore.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/18409920856.pdfIn PDF document text
    • http://c2r.su/uploadfiles/file/2021090402011073499.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/8830860258.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb2e83cf47---22122895525.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/lebufojafipijozusu.pdfIn PDF document text
    • https://nidi.mk/ckfinder/userfiles/files/85195640896.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/73614447941.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/bc1a86268ee1057554f878dddb77b1ee/65268520932.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/pulibemovulep.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1631132442.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/19800471225.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/wigenunul.pdfIn PDF document text
    • http://reckdance.pl/userfiles/file/ritenesoliz.pdfIn PDF document text
    • http://ormansagszive.hu/upload/file/59611207997.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/xaduxowituwekavusivaji.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/64540706034.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/85365798514.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/jixojobolip.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC725 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3C 10696 bytes
SHA-256: 1de83ed50d898c7fd0f93e7e2d835459762305a99a69d9989c153181be99d35e
font_02_sfnt_off0000f801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF801 18312 bytes
SHA-256: e3fe59cd8bd34e151ceb934f1c7a4c86401afef36f621b4b47ba0ee08e3c9c08

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