Malicious PDF — malware analysis report

Static analysis result for SHA-256 9970d3b47dfd402a…

MALICIOUS

PDF

88.1 KB Created: 2021-09-17 23:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b0120aa9a41ecbd206ec47bc00b9191e SHA-1: bb61e65437c6fed849efde6fa302f8bfa14fd163 SHA-256: 9970d3b47dfd402ab204ba1e259fa976e084d7cf7dcb707534824f89b8fda009
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs pointing to external sites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or redirection mechanism. The presence of these links indicates an attempt to direct users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://coretry.ru/uplcv?utm_term=romeo+and+juliet+play+script+pdf PDF link annotation
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/jo7enp1uj0rm0vp7bd4lf581ra/dujixuki.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/figapebakawif.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/161433a309a0f2---92714859670.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/57908098965.pdfIn PDF document text
    • https://dacola.com/upload/files/45395851010.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/giwudugufuma.pdfIn PDF document text
    • http://polaryachtmanufactory.com/res/wysiwyg/file/6645658923.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/17960428619.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/78670671041.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/6aabc169e3b8d8963964ebe2548ddf34/88464912989.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/24410162802.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/94433755985.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/tebadazez.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613246bb3b13b---83801033336.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/sogedavugokonetaxuka.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/sunavumutulenerujopo.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/setagipodesa.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/50527864815.pdfIn PDF document text
    • http://denetimmusavirlik.com/userfiles/file/fikosomogujepanepefofo.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/gebososo.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/lotexidutodukeselojep.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/60602741347.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbc706bc49---95837753667.pdfIn PDF document text
    • 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_off0000f49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49F 17128 bytes
SHA-256: 7d43cf2f85126b618f0290d49f687de60a0f152efbde017879870cff3d83902a
font_01_sfnt_off000120d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138EE 11172 bytes
SHA-256: 421d86fc7cf774a27554365583cce81eb7e91a975e5a799efb9c84ee4294c3d6

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