Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2cc64329a8969d…

MALICIOUS

PDF

95.1 KB Created: 2021-08-04 19:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cdf8940cda8aa33fe042182873c285ed SHA-1: ed5c4b75b6f84f3a6e97dea7e807531fc3e19e83 SHA-256: fc2cc64329a8969dd8338934b071e037c0936c263884381dbc69eec69ea72e1c
164 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs, with several hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9855

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 https://amitadevnani.com/userfiles/file/dafaragudokewok.pdf In PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc10120681---38186819015.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/gujezuxul.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/kemom.pdfIn PDF document text
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/gebopefibuxifozusevefa.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/1551923036.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16084ea76992cd---dakukadepabafewurix.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/f15b9bc7c4bcb1503cdfe3eb2f548c53/saboropixizoju.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6863d6f01---tosid.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7a5e0d7a24---10251192464.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/paxosujeza.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/83640738888.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/15422908229.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/nulagakojaxigomolodu.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f2638bc38---fetij.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607425b30be00---34280921108.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/dabodegalurusanativoxe.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/voxulemuwaju.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/menawupiboripizavijibiked.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/dc11dd9366322f3c9b158012883a69e2/70000029011.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/23635728251.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/janavijixa.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/f471806a4ca97e5cdc48855fe58325d7/rupobiwogakajejipaf.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/7n7pgmaasubt5c8pu528f327u6/sigufunapurizikunex.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/58709269722.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077169688057---xasanujozal.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/63b333c9e14b9a4911111df628c912e6/lapulalevate.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7a25d39e7e80e11909a4b6f8f20c45ca/509166469.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=selenium+webdriver+tutorial+java+with+examples+pdf+free+downloadPDF 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_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 18136 bytes
SHA-256: dbe97aec8c6e376fde0484011938c9d8c0fd568a762a235ea541b5291c8b23ca
font_01_sfnt_off000137d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D8 11460 bytes
SHA-256: 37152a8f76fb0cc1ba99b57d35f2312c651367f4bd53581727dd4c1244b64787
font_02_sfnt_off00015289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1