Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2adfdff8dffbfd8…

MALICIOUS

PDF

99.7 KB Created: 2021-09-18 15:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 583ea994d6f2ee9c49ec390009404fb7 SHA-1: c58f70a5e1c408d84aa6ab6c922ed42ad7ad67aa SHA-256: b2adfdff8dffbfd82c3e71efae0bf697079eef397dcff56fc19f01150df15cac
164 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Heuristics indicate it functions as a link farm on compromised WordPress sites, likely to facilitate the download of additional malicious content, as suggested by the 'SE_DOWNLOAD_BUTTON' heuristic. The presence of multiple embedded URLs, some pointing to compromised CMS uploads, reinforces this phishing and malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5a059f3b0---67177963461.pdf In PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/43055573592.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/3552364630.pdfIn PDF document text
    • http://inphilong.com/upload/files/lisuvidewuwepi.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/5980069196.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/tugapo.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210909053657.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/butefibubig.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1613e84ff9e0d8---vigurofes.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/pogukofisuloluvexeju.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/22622650616.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/tavezumusuj.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/66693978681.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143866c68c0c---48233832650.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c7b467b40---simiza.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/vasuk.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614074b06b97e---80150917794.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/69423205036.pdfIn PDF document text
    • https://edusfera.pl/upload/file/wekok.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/zizosuroza.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9369783ffdb20dce26abaaf4d05e7e57/73023149485.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/91626824047.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/budotujibewixen.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/21326192281.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/87437797655.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/a83b58482283d02e2acb877b63806fc6/52780036042.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/45894086124.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=chal+mera+putt+2+watch+online+free+streamingPDF 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_off000119a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B9 11264 bytes
SHA-256: c65f82e002ecef0f22fb6d4f485322fb5c092682d318131612f93cfeeaa9116e
font_02_sfnt_off00014c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1D 19880 bytes
SHA-256: fed63d2dafd3880c4135d4ae81d8b78233359c13d7f139491bee1c95346eb31b

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