Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c465def3cbcbbba…

MALICIOUS

PDF

80.5 KB Created: 2021-09-23 03:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f520cc5f00dbb90e0e98e058cd7dbed5 SHA-1: a0e4bc3ca7bb5a2b23a2200b2f60393cf2c0e195 SHA-256: 5c465def3cbcbbba9b5d62977ed58735b97d6182bc8bb4b8b3a70b12da374ea2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://hanleyresources.com/images/21496988065.pdf In PDF document text
    • https://quangtriasianwindow.com/uploads/image/files/75643009246.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/35518207750.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/savegurepepiwixamuwox.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/ea9bba4329cccfa1dba69ce82eafbeef/wedelorinoki.pdfIn PDF document text
    • http://iccjsc.vn/images/uploads/files/87965519728.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/20219182317533461.pdfIn PDF document text
    • https://timminsrenovations.ca/file/PbjY8puAT0ypHRmn.pdfIn PDF document text
    • https://interconformity.ro/images/file/42906377352.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/fojadobemabol.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/kefesijiwuwubavex.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/46244046810.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/70164696952.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/2e6c6424dde69220f2048c11b7e4f315/16202156782.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/vawuv.pdfIn PDF document text
    • https://mangallagn.com/images/file/40671696422.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/44022898304.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/vurirazakubarakukotazikej.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613eccbd05c83---18266242724.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142a38446e20---37100338130.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/bewigupexefibu.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/51247524270.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614569ee3d30e---jufaped.pdfIn PDF document text
    • https://preciseenergygroup.com/media/4053776324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ldplayer+5.1+download+for+pcPDF 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_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 17804 bytes
SHA-256: 2b98622a7cbaa6112b99644f80215eb58938f099577dfa2ae519f8a2342a85bc
font_02_sfnt_off00011bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDB 10664 bytes
SHA-256: 43443f2977fce4aa45245b037efacdca96bd6ffadb3304fd0a6d7fa86d76428c

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