Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8f1d318e62fbe5…

MALICIOUS

PDF

83.9 KB Created: 2021-09-20 13:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f17d1e98bfb5ae0853778d0e71c3a7b8 SHA-1: fa1cd1b91534d595d0f254e609978b0b978a58f5 SHA-256: ca8f1d318e62fbe5931ff5ea7d775cefc822f6b2f59c2171a0c1781e785de125
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and link farm behavior are consistent with techniques used to lure users into malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/32686226384.pdf In PDF document text
    • http://rlangkhan.com/upload/userfiles/files/muwizizepesu.pdfIn PDF document text
    • https://hoavily.com/uploads/files/lejuvevitazome.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/5335108328.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/fisuginovovako.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/dupimotakegofileti.pdfIn PDF document text
    • http://remobudostol.pl/pliki/64633656105.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136675865e1c---27696056284.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/gelejokibuxa.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/36f2fe5fcc26d75de07ea546e78d0b0f/mijaxuwudoritoxapotanire.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/cecad702cccbe7318c15cc02f518e08f/91052621899.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/76799670375.pdfIn PDF document text
    • https://granitnet.hu/editor_up/kenokuvotonelofaj.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/jijuwuxuxod.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/pidomawuxe.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/puvawuxerum.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/rovofajafajepi.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/xojab.pdfIn PDF document text
    • http://armanetti.com/images/46272164132.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/zuzulelijofa.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161471f22458db---31927901520.pdfIn PDF document text
    • http://belovosushi.ru/files/bemumesaf.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/velotarusafapefizebo.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/56095626462.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/73787890902.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/bakatom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=crash+bandicoot+kart+para+androidPDF 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_off0000de3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 10696 bytes
SHA-256: e9dea4bdf0e859cf32acf88f4d6f9e6b8cd19261e58835c6b40edb057756e760
font_01_sfnt_off0000f67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67E 19624 bytes
SHA-256: c15ef9b968bb164fe3cb11f374c7997ec565632d746aa09f51f61ceafd847200
font_02_sfnt_off000129e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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