Malicious PDF — malware analysis report

Static analysis result for SHA-256 29dcd233d24a90fb…

MALICIOUS

PDF

92.6 KB Created: 2021-07-17 15:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c8e23ad49226c2b00f8b0d4d6d97dd4c SHA-1: ad4afa88afe76e7b229b1819d599669a984932e5 SHA-256: 29dcd233d24a90fb84850ae255c20de3160769e27bb93e6670720bac943217da
164 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 compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.
  • 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 https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/hreqnduoj8tqtrm5pr766j99h9/luzanimamekaf.pdf In PDF document text
    • http://fautographie.org/images/userfiles/files/57013564243.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/93232979415.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/2008404960.pdfIn PDF document text
    • https://actorconseil.com/files/file/4848915393.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/3c7918cd7a2f2946cba3614877fe74d6/xexemadaviseru.pdfIn PDF document text
    • https://banghenails.com/upload/file/28435045012.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160dbedb3eaded---gujopuxug.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/67348162886.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b222b12360c---zimuremafanalipebewozetal.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/sadikebigi.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dmorubvdeattob2g88pn2c3p40/11871472350.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/p3nsltpf1t8pf8emhkq7s14vfl/98362328046.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/4eaddbd7acd2041612cc0fd5a5d26fd8/milijadizevuwemeleduxozi.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/bixofezudawinijole.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/54859313171.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/83305644351.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/fisofapojorodagavemototok.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/6e9b0c7aaaea889ee5dde4c45f454a50/zedotogex.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/13997027958.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210614121444705031yg7ov.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/resiv.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f8cf7c72031c2b839817cb9d2e30c401/29016986312.pdfIn PDF document text
    • https://banghenails.com/upload/file/lunufobotasoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=detective+story+by+rabindranath+tagore+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001061c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061C 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off00011b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B62 11176 bytes
SHA-256: b74bc9f90961f06299018fdc885bfb62cd1cd3c96640f0fa1629346168896cc9
font_03_sfnt_off00013520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13520 17432 bytes
SHA-256: ccb8d280efa676994a1276ff2ff32b40737588562b51ed2860cc7c051bfe4bd2

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