Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5e7f32f43afa0c…

MALICIOUS

PDF

93.7 KB Created: 2021-09-23 07:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2650555222f10f5905453029a366b569 SHA-1: eba6dd983dbbf1099ca6deab5e804ffb06b02157 SHA-256: fa5e7f32f43afa0c281a5710782627dac02212ce337a80e793c65b6da5883e08
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as 'https://huntic.ru/uplcv?utm_term=agatha+christie+murder+on+the+orient+express+book+pdf', suggest a lure related to book downloads, likely a phishing or malware distribution tactic. No scripts were extracted, but the PDF structure and URL patterns strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5786

Heuristics 5

  • 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
  • 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://huntic.ru/uplcv?utm_term=agatha+christie+murder+on+the+orient+express+book+pdf PDF link annotation
    • http://www.egymast-segito.hu/uploaded/fck/file/wanikelexe.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/78259941912.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/mupovaladewego.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/c62bujh66kb3cnlgsvqkpmd5a4/tumifonivafise.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613819d63606b---watekezufilopefediwukuf.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/55701135112.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/pagefajapajalofowoko.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/lixepumetikareg.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/golefow.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/he9ld95cjmvd4jrgj58bh1khrm/20653823450.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/sidajibi.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/28833637139.pdfIn PDF document text
    • http://platcometals.com/images/file/21143076484.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-4/20210904055721305619.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/64597522853.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/70048053176.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/29485585281.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210913000805.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/ximobadovelezetazuroxamiv.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/7031000192.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/duwozadabuteberoz.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/duwixidanokuxazibafekozi.pdfIn PDF document text
    • http://oilspecchem.com/files/jogipebofetisejofizuwowig.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A85 11436 bytes
SHA-256: 4f47fa5e48b4a9920dc656dab9b0c78f5228802891bc1bb9765c8bc25f1040b4
font_01_sfnt_off00014503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14503 23196 bytes
SHA-256: 75a98072ea201d2cfd9df84b36b1daab97354c3614220dbc9a1dd0a9203ea643

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