Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46dceede056d2ae…

MALICIOUS

PDF

72.4 KB Created: 2021-09-25 01:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d1cbf8725330ac6f21bff6fc872258b1 SHA-1: 3d54c6363e36c90fdb0d5d4d0fcc6059134dd21e SHA-256: e46dceede056d2ae3bbc6800189c5d892bc166515e4afe26b0adc5e2f2691932
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also contains numerous external URIs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://baby-daycare.com/uploads/files/202109012214437275.pdf In PDF document text
    • https://giritrademark.com/content_files/files/92455140621.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/6223215699.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/91273631443.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/wutodefuvanewowirukibopuw.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/fukuxaxotimet.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/29470362095.pdfIn PDF document text
    • https://citytrafik.nu/images/file/jejiwavufelavejixeji.pdfIn PDF document text
    • https://ptogel1.com/contents/files/30166677124.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/1920ed8d23229eda83bb6c843940358c/32180182182.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/62086268918.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/vilenoxoporepanaka.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/67814420045.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/jawupovuwosixelagaxaxa.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/noramejujifivig.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/sisagotok.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/jasapa.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f8078d059---zetodefof.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/rulobaludux.pdfIn PDF document text
    • http://integrotech.pl/zdjecia/file/65207821219.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/7836667578.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/gozapadagot.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/mikotagemomutaw.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/boluzokutewiroxed.pdfIn PDF document text
    • https://avflash.nl/upload/files/janutubureba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=apk+powerdirector+premiumPDF 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_off0000b7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E8 17416 bytes
SHA-256: cebdffe6f9508598dc07e717b772167633126d2b2c2cd328641bf6e904ef03e8
font_01_sfnt_off0000e414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE414 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2B 10452 bytes
SHA-256: a6c20879c103ea52da853910e83ca5ed87d5bcafc1643eda09a2e25824bf29c2