Malicious PDF — malware analysis report

Static analysis result for SHA-256 590bf74b6db63848…

MALICIOUS

PDF

66.4 KB Created: 2021-09-25 06:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 62d843d3355d3ec020748b59675b43ae SHA-1: b9224b06f0fa42d24c4de5d69f7c16119c1f2f77 SHA-256: 590bf74b6db638485a5e5977d884f949feba7048f621cb817cf206aee178ad1a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which are identified as a link farm hosted on disposable or compromised domains. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5121

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://cncsprings.com/d/files/25148267511.pdf In PDF document text
    • http://ex2010.com/uploadfile/file/2021091103235473499.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/34666524057.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/14265076694.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/75380197095.pdfIn PDF document text
    • http://dichvuhangngay.vn/uploads/image/files/wezonujebubulosawir.pdfIn PDF document text
    • http://trieuduong.com/images/Download/jusanifegaga.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161427cb5f17e1---6159402412.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/vapole.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/58008316482.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/tojunuviw.pdfIn PDF document text
    • http://spharma.ua/files/file/34503113072.pdfIn PDF document text
    • https://red-adlay.com/upload/files/29312203349.pdfIn PDF document text
    • http://watch62.ru/files/files/61244444980.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/18065313095.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/jelagemo.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/balebilinekenit.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b61a271793---91943034728.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/butimunidiwepimuze.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/bapojego.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/gagepabilepejexotafet.pdfIn PDF document text
    • https://codefon2.solar-napkollektor.hu/js/ckfinder/userfiles/files/lamemefufuta.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/03ddc92098ccb9cdb3a6a4ba432320ec/fofuzixiwibazareruluposuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=along+with+in+a+sentencePDF link annotation
    • 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_off0000b125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB125 10476 bytes
SHA-256: ace6d8558f2fdd99152311fe25eb0c4b3396579beeaed3005db3ec088c026215
font_01_sfnt_off0000c901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC901 16944 bytes
SHA-256: 7e3b08561f0d069020d0c6c038928dad939de1210a7510ee24a2c11c1d33cbf4
font_02_sfnt_off0000f445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.