Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe0e6698325e533…

MALICIOUS

PDF

324.2 KB Created: 2021-07-25 12:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f6d1f585a705807bdb60b3e37fd2f9c1 SHA-1: 1866df65c5631f71504624d3bdad1daedcc19a7a SHA-256: 1fe0e6698325e5338b500d7dda76198e388c0362b4c4958d7f06a6bd06588e9d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to exploit vulnerabilities or download further malicious payloads. Additionally, several URLs point to compromised WordPress upload directories, suggesting the PDF is part of a distribution chain for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8628

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.
  • 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 https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/otfflea78d8r8mi396u1ne8cfn/mekewenobosizijobupereb.pdf In PDF document text
    • http://dpsszczytno.pl/photo/file/bizakel.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c705e617356---11204190435.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/jisibot.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/tagewogizowirugesurikupal.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/58881781100.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/bavitewizusup.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/moxamegafedizosudo.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/nukejeniwukolese.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/62416078456.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/4ngirlcso28djo9nf5877fvaks/niwikolinomafulatolajomo.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/fivizebep.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/66460392551.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/68lp1n0qqco7i22akjcs9ch6m7/46467263427.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/f4107ae820dde6a25a9d1e640076ef4c/6313324465.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/ranuruvojolemapakutiraf.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c199e743f3---21699831373.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/daporozudawode.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/30354016350.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/83114252785.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0ca801e04---bajaped.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d37919545c---vefatasajujowevibebixav.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/zolonotorakaxir.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/60a25aee6600d9a496b4c143422635c0/39168759870.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/60eda6c88d64389029a6e5b46c402b5a/siviwutozokupowireko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=reading+comprehension+passages+with+questions+and+answers+for+competitive+examsPDF 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_off00049a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49A71 11564 bytes
SHA-256: fdac6b0f4723ec5a27444708a615a914dc85f78f9cc4b603542f758f848d164e
font_01_sfnt_off0004b536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B536 19036 bytes
SHA-256: 46e85b67c5c4e82d1cda5aa0811728ec577437149f114cd508d1bbc4d2b3b698
font_02_sfnt_off0004e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E770 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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