Malicious PDF — malware analysis report

Static analysis result for SHA-256 11892bc20cb21b52…

MALICIOUS

PDF

134.4 KB Created: 2021-09-08 02:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: decc07fec37c90804ce15a62eed384ff SHA-1: ad85947a543ee6acd8b6216ac9a2c40b311152cf SHA-256: 11892bc20cb21b5218a13b6229ec56862455b27c4cb0f10537aa3d0e1e198a04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to directing users to malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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 https://intervalhousehamilton.org/ckfinder/userfiles/files/tukanurogiwaxirasadi.pdf In PDF document text
    • http://aylabawadi.ae/userfiles/file/17649021016.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1611348a251d27---nosoguxezugexuvimake.pdfIn PDF document text
    • https://purefeeling8.com/data/file/valetexorikerasatolodok.pdfIn PDF document text
    • http://pjteam.hu/uploads/53180735492.pdfIn PDF document text
    • https://questyme.com/userfiles/file/5941302260.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/64588320750.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/pimekexenafoxuwibele.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/86834292440.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/44117157408.pdfIn PDF document text
    • http://klpa.net/userData/board/file/49833279370.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/766a1aade60c64c078eb725d8f424c4e/zelikofemawisugixuda.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/85dec5e51874887df6e4510425dadacf/sepujevenumotavuv.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/mumasakojatagadejefomadil.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210501202159842226822.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/qtidodj0kksb21mvqnnc5s0tgo/20174115229.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/ei1327rsgpt5pmpgac80gub786/33077979229.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/61663906829.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089dbe188a88---31734047434.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/3456944692.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/suzokuz.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/63291219925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=formal+operational+stage+pdfPDF 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_off0001a780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A780 10816 bytes
SHA-256: 515c1949ec9b6f51c85df17e01d797d4575b6377c7e931c0e41c691ac7ca989d
font_01_sfnt_off0001c027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C027 19880 bytes
SHA-256: e5c8b7a6fb44077dcf87304de74087fcb6dc6feec4bcbee668ec644d17080e15
font_02_sfnt_off0001f42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F42B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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