Malicious PDF — malware analysis report

Static analysis result for SHA-256 7247fd40a26a5723…

MALICIOUS

PDF

102.8 KB Created: 2021-07-14 00:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 081cdebca163cc7f6664b6c4b824aed7 SHA-1: f9d4fef530463f7a8f39fd3d50d75728c9e2f98a SHA-256: 7247fd40a26a5723dc0e5f131df031ffc768811b561f17c2ae46d344b518ade9
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external URLs, with several identified as being hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO manipulation or to distribute further payloads. No scripts were extracted, and the document body was unreadable, limiting the analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 6

  • 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.
  • 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://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/26584486571.pdf In PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/ea3f284a90e1c64f042a076df7a7c1a3/fexotuletazupe.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/df35671d824c9574e8ee3d38fded2b5a/tusamuxexopitefifafak.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/31527471827.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/tisutovapizav.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/5737od32gf1qqkh3u3eqp7jr38/timekakobepofovufore.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/gevuditamojonagowif.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2427955191---91047534745.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/bowufapegasutamalu.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c192d9dc911---22081163533.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/f3cc5ac4f109ede1b2711a7c14b2f72b/11276779357.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/lazuvekuxatamabegebo.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8361c4bd5---dukutaboxoduf.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/db78850302060ee0dc3e9c05fc7226b4/selebolujubipekifide.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/26719188164.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/80368660342.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609844c53f226---pofotewapolisikufu.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/35827664642.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160910bca77b7b---pofalovapegudapi.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/b1d856345ea21ca96539b03e8cec03cc/nuxododekatoni.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/dimupup.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607250ca295db---58459031784.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/af7644dbfc472020ea52c7add55edee6/67703772521.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd7cc00b05---xuwejunoburomomame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=easy+classical+guitar+songs+for+beginnersPDF 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_off00012f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001471e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1471E 10848 bytes
SHA-256: 4bccb4302ddb5386c2e8a9a34d17ea3836cca586cde35cb73032eef9ae884705
font_02_sfnt_off00016060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16060 17380 bytes
SHA-256: 4c97a10f55c298c299b3247fff5325f7a536203f8bd65bd365c354e93cb7beb9

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