Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae04d75eb703bcf…

MALICIOUS

PDF

101.5 KB Created: 2021-07-03 22:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d767745bd9ed1d56f6c21dbd2bce0419 SHA-1: 4d7f58cb6921155f035ae561c1ffe89a9c9f326f SHA-256: bae04d75eb703bcf2e626dc61cfbe2b3aa2c9738533c4d2df490242dfdc29e4a
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised websites, as indicated by heuristics like PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e13cab824---weteli.pdf In PDF document text
    • https://dailyiat.com/html_upload/file/xuzaka.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/97605681413.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071f9d41d6d4---78894840311.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/e8h6jieo8ndkvvlbunhvu678jf/jepilivimi.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1af05583c---vipukifutifipexewewis.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/bogorije1624596611.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/3c903a3cf6bf9d7da2557e2f03342247/nejuzibume.pdfIn PDF document text
    • https://doctorchina168.com/upload/files/6288768546.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/31792508159.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fd20865cb---rarogegigalekawadowanusat.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bacc1091365---41829886882.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dcd0e4abae0---bonuzixewor.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/rijaxutozulepok.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/e52fb118c30b0a72f1b2ba867ba43382/11043256494.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/38940228445.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609240e14d57e---62071697488.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091653b95e3c---nojixufitepabepikura.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/752a4c8d35562ccdee837aaf8d25a46d/gavujevunidopudexiveku.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d72d20fa5f---38314542591.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/oms3t2v8ln972io1v6s2odkn15/fosiwubetajuvosuk.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e7170d18d---panezub.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/gosidudawefikif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=allahumma+ameen+meaningPDF 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
stream_005_off0001586e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1586E 25768 bytes
SHA-256: 37a7a52170de0d8d73b961f2cacd4ece6ae4a248877f4be9ce78a00f26aa0591
font_00_sfnt_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11604 16912 bytes
SHA-256: 22c84bb731192fc92ad0e75b95d1b7ff861626b4155596ee9b3cef90a546823a
font_02_sfnt_off0001420e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1420E 10152 bytes
SHA-256: f23e98002550e7d478b93248783dc165d1f5dd73e34884ddadc322ff08012241

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