Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0a0c3846a6923d…

MALICIOUS

PDF

78.6 KB Created: 2021-09-16 17:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 92b74c44c9ce1fde2ed1af6360ad7826 SHA-1: 00cf5aa12181d6dca52b4167f29a2bdf00be2d9b SHA-256: 6d0a0c3846a6923de7a9f16055e5938bb03cc59879a4e73bc9503970bea41301
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload storage or disposable hosting, suggesting a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • 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 http://akgwealthplanner.com/crm/files/netuda.pdf In PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/81981928444.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/91638997159.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/50757c60ead6fa968ab463a3705ea07f/genaloruzewukomoxusuje.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613165720411c---raxasesivu.pdfIn PDF document text
    • http://kammed.com/userfiles/file/domoxinokukobufevikisowas.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/92565486039.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/10986839471.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/7093570718.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/2215089915.pdfIn PDF document text
    • http://orthodoxnews.us/file/kubakurevanadi.pdfIn PDF document text
    • http://kustari.net/userfiles/file/90348195283.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/zolenadezowunu.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/juzifomowi.pdfIn PDF document text
    • https://goldmenu.com/userfiles/file/nokukozepabivizolezigeji.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/97639870645.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/39918648335.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/25391834765.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/kugosiwafulunebiwogagat.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/koximunuj.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/tagalijosonolumafazaj.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/1230499995.pdfIn PDF document text
    • http://jaqalsports.com/files/file/87582376207.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dacaea3bcf---dufasefuposujujoveze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=subway+surfers+hack+apk+modPDF 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_off0000c910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC910 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 18964 bytes
SHA-256: c98d3e933daf2209490c35415911a929a822e494a8fbdf06e9dd4c5fc05ff71d
font_02_sfnt_off000112d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D8 11152 bytes
SHA-256: c9b48390051913f760103ed9a8f91ec7e9f2e811532af5b0fecdfc1bedd7eae4