Malicious PDF — malware analysis report

Static analysis result for SHA-256 585fe215c576385d…

MALICIOUS

PDF

72.0 KB Created: 2021-09-20 15:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5a21d87aaac8b3b9be33fbabe2e6e45d SHA-1: 1d8d14dd27a7de2d97f064a039b3a40f99901def SHA-256: 585fe215c576385db3da137856490e26fc747bf9990e4faedabcd99f6a88b869
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The presence of a link farm pointing to multiple distinct hosts, some of which are hosted on compromised CMS uploads, further indicates a malicious intent to lure users to potentially harmful content. The ClamAV detection as Pdf.Phishing.Trojan strongly supports these findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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
  • 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://go-pxl.com/uploads/files/49390214214.pdf In PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/9e038832394ff48309635789f32fd142/lizonevafupixela.pdfIn PDF document text
    • https://codefon.hu/js/ckfinder/userfiles/files/nejepodudagapuguledufor.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/7086517154.pdfIn PDF document text
    • https://ustunbilgisayar.com/userfiles/files/momovonexefuwodewel.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/mepup.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/gawamigefiwe.pdfIn PDF document text
    • https://toscanafantastica.com/userfiles/file/6213321710.pdfIn PDF document text
    • http://medrea.ru/upload/files/20956853852.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/27427002667.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/60366254201.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f76fb80ad6---daxizosiw.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/lenepuboxilif.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/9995552452.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/rakeru.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ddfee1baa0cad06f2e9af23c637c9671/wasadununira.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161318e7e1946c---tejenagebenegafuvumenode.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/xivepadid.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/bibarexoravorerozeze.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/masenukamagafajeronemano.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/50454998737.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/watisowupewulobepawoke.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/96689854689.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/mogabakugumi.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/zobupaxomokunizazetij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=amen+movie+torrentPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA38 16380 bytes
SHA-256: d585059c43d155c5ffcca6b52859804ba474d293490f22adca6339d6c3c90601
font_01_sfnt_off0000e472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE472 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC88 9940 bytes
SHA-256: ba692b3dde4f369b27ce0682c21a494730c51ced1f1b468c6efa8941c26d4f46