Malicious PDF — malware analysis report

Static analysis result for SHA-256 8449f96e5113427e…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 16:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e38cdc3adfbb2d6c6c4e6aa2f98bc245 SHA-1: 54f5dbd5aecf76020e0207d94c9775d6d7815f9b SHA-256: 8449f96e5113427e552e5780ce6df7429057152dc229190095f0a9c0f7c7ce9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS platforms, suggesting an attempt to distribute malicious content or conduct phishing attacks. The presence of numerous links on disposable hosting further supports this malicious intent.

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://nessium.net/userfiles/file/xokenumefefigibano.pdf In PDF document text
    • http://kameleonhastanc.hu/files/file/82170408808.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/0227631cab966ae0bad1e4b32a66a123/89708742884.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0c36c1a41044245f7b4187d26cd8831/56738163188.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/manoz.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607935f37c23c---1217290573.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/mamixu.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/99121860034.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/vibujugepuribixaxegito.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b3c290ecd---77434011417.pdfIn PDF document text
    • http://dentistturkey.com/image/files/26670158958.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a297489fb---sawulezaratu.pdfIn PDF document text
    • http://tuzlakart.com/files/40982100611.pdfIn PDF document text
    • http://shelton1961.com/clients/35589/File/76661636705.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/sesefusibovokukid.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210817060921.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/bukewepiborejubewonole.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160720ccb97506---zezevipa.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/54450988212.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/46108036369.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/xulomaxurafamo.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/vitijoruvudadaxop.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/redol.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/b86d00c521fd2e4d38eee91c098a6ded/68757470752.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=yaskawa+ga700+manualPDF 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_off0000d2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CD 10344 bytes
SHA-256: b8d0e692689913c39556c3393b028e585640d8f7e61266fb652a92815260c0b2
font_01_sfnt_off0000ea31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA31 18324 bytes
SHA-256: 9b50c425cc1c7082825f6b7546617e3fd695d5f484461c572dd4040b82989c3e
font_02_sfnt_off0001196a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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