Malicious PDF — malware analysis report

Static analysis result for SHA-256 805f39538281983e…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 01:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fe9257230158ec17e114d0274bd9a44c SHA-1: 00705a47defa40648c1bb6fa5f3712f4079e7f58 SHA-256: 805f39538281983ef83dc5b650f70db038bfa2d2eedc1b12aab12f4842323e63
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains embedded JavaScript and a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a download button lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/952cc7c9a15244219edc56a9a4fa11bb/98526438109.pdf In PDF document text
    • https://smshealthcareservices.com/ckfinder/userfiles/files/rakewem.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/82753155566.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/98380675715.pdfIn PDF document text
    • https://raselapp.com/userfiles/file/dumivapafonepodituko.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/73055327210.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/15140173208.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/suvegu.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/kegevavuzokipijasetupa.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210909033827.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/bubusurujitetixovosibogan.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16137e963d654f---zuneku.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/xuruxobedaxo.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecce2a3fa5---vunirubig.pdfIn PDF document text
    • http://ihdbd.org/upload/files/80146818408.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/koxoda.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/gesovutexanet.pdfIn PDF document text
    • https://computerzone.pk/file/54944937700.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/16371883786.pdfIn PDF document text
    • http://berbun.com/user_img/file/4296004240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=car+parking+mod+download+apkPDF 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_off0000e2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 10544 bytes
SHA-256: 197291ba7f6c6f509f1f2221cf2be61e84c5d2baeda53afce6af6544d7a49eb3
font_01_sfnt_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BC 18188 bytes
SHA-256: bf6cff6e483f9fd92329765461f126ef660fab179678f7d640c578b23d9eff85

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