Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9a2472f55d98c4…

MALICIOUS

PDF

80.2 KB Created: 2021-09-15 22:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 80f0aaa7fb6251ca5afcdf5637478f89 SHA-1: a4715c07c39ea39f30ba04f92d5f5dc25724d04b SHA-256: be9a2472f55d98c4e7ddeff8123d04e68458da69d8f0666fc00e02ed83822698
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. Several heuristics indicate the PDF is part of a link farm, pointing to various external URLs, some of which are hosted on compromised WordPress sites or use disposable domains. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://onecre.com/images/content/files/figarawowaresaravi.pdf In PDF document text
    • https://heatingboiler.ca/fck_upload/file/52024557013.pdfIn PDF document text
    • http://coherence.cz/userfiles/file/lepoge.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/25959908460.pdfIn PDF document text
    • https://salwangurugram.com/files/20594800385.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/gesimezeneniwibuvadora.pdfIn PDF document text
    • http://guowangcable.com/d/files/86545331594.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/75321746450.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d0ced6385---36355515538.pdfIn PDF document text
    • https://tarsiman.ee/files/file/fepusal.pdfIn PDF document text
    • http://nincity.de/inline/file/bugujositaroroz.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2ebfe2622---zisojapexo.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/381d564ff97c63743927aaaf10bd4528/natav.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139e6077eb87---tepogabi.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/xanozakibajad.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/91707437253.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/juneval.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/wiwubiz.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/wepazaxemudigugumunegefuk.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/jiwugaganu.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/15697687166.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/kesefofuvivu.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/wawetijelinufa.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/powexor.pdfPDF link annotation
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=text+size+in+androidPDF 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_off0000d7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D6 10320 bytes
SHA-256: 0c43fb27f86746ddc849281bd204d22a81d5ff90130c3a3534f9beaf1e4f1318
font_01_sfnt_off0000ef4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4C 17012 bytes
SHA-256: 7d3e1c38c9647e3f16e3c8695c84d27d3c4fd2d29af9511f8a8429ebf56f14da
font_02_sfnt_off00011b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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