Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1daa46d85e3b5bd…

MALICIOUS

PDF

71.7 KB Created: 2021-09-05 01:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3f72b0d9667fa7e0e5e42a7438d6f6b7 SHA-1: 62a90942519c1f6df23ac1a292b5ba8bc7e0392d SHA-256: b1daa46d85e3b5bdc838b16840776f73d5a1410123222aa9063476129208e448
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristics indicate that the PDF is part of a link farm hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • 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://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16098ad729fabd---putinetufej.pdf In PDF document text
    • https://soudurelauziere.com/upload/editor/file/wogofaxef.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdd53dc54a---turowujala.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/77894208533.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/91099262082.pdfIn PDF document text
    • http://nktrading.qa/file/files/kumeligejuka.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c43b50a02c---81802336506.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/vopavobuxox.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/93214782383.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/metereboku.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/66689478384.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/56534275291.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/vefijimitavemaraguliven.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/rutofekopaw.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210707_043438.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607954a0d921f---49666012291.pdfIn PDF document text
    • https://lesura.net/userfiles/file/pilanodixakudufisarikuw.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/zakukexorofivebaditezeje.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/vbv5fsf5apgu0tep8js2govpv9/kutiki.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/fabuzu.pdfIn PDF document text
    • http://jogamiskolc.hu/ckfinder/userfiles/files/33205313903.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=converter+from+pdf+to+word+documentPDF 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_off0000b76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB76C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF83 10596 bytes
SHA-256: 66ac8fc29ecec0ccee9205d83923468f29275bd31cd16eb4fd29b825015ce8ee
font_02_sfnt_off0000e7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CB 16112 bytes
SHA-256: fb9c52478a6c3d30d22805f3709480127b26e311feb1018c560921ae28a2e694

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