Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ffd2e879e375d75…

MALICIOUS

PDF

77.1 KB Created: 2021-07-05 23:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 680018a67aa9c1e0115df07190451cfc SHA-1: a8d196eec44149870b727af7593eb3c5eb6bb4ec SHA-256: 9ffd2e879e375d75c08548a3f0f78a0ddf271394d1b78e52d168632272eadf59
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to distribute malicious content or phish for credentials.

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://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/sudivikidubawivurokekuruz.pdf In PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/7437368345.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/053861384566f9066dd640d08f4a19bf/buxedaw.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/9a268065fbf92e178f842504b6616445/69046740687.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46f62b847c---86518710422.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/55108288580.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/disisofi.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/dixidapi.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/9c2b9742f0d9188ee311ec51dd43f8a0/23551508686.pdfIn PDF document text
    • https://memoservicesrl.it/file/xewarixip.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/jqnd4dmehcvsc04dqntda9dhh2/43858274827.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/f75c63833de3b056fb3343fc39c8d89e/penulofukos.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/oquqg4pket5i26n5d8de063vuu/64911179617.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/barazi.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-28/20210628052303396720.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/41562708655.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/zapuzaroxinilixo.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/pi503tc4l58rq6i9d0i42q9o15/ginaponatupewilome.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/aaeef4692ea4fd08a62bd29532722758/29610860497.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/15792485787.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210618_21535DD5CE3B9762.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160967a432e793---90878803337.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/94ubijua1e4cvh2hvt7rv8omq5/75493224163.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=the+lies+in+your+eyes+sweetPDF 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_off0000cb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB13 10304 bytes
SHA-256: dc0a86fc43b3b0e232a660feeeb570f594208c65c8a7edec168b075e7cfa6f0b
font_01_sfnt_off0000e250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE250 17044 bytes
SHA-256: 7d6a03841e6199366e5a7d04fa2af3f80a27c6fcdca2e4d2df08868b8a5403ff
font_02_sfnt_off00010f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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