Malicious PDF — malware analysis report

Static analysis result for SHA-256 4969adf49b528262…

MALICIOUS

PDF

77.1 KB Created: 2021-09-05 19:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9b9a897167ee42b9f0368bd736506bd4 SHA-1: 7b8a8360ad1b0732cba7b08efae1f8b9776cf266 SHA-256: 4969adf49b528262a234d2076d53927d48536bb045032452d68bd437470c4b4e
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of a visual download button further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=abanaki+oil+skimmer+manual PDF link annotation
    • http://rallyteamwalraven.nl/file/36360305812.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/lorulalututi.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/sagowa.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/jopiwiraziwufujarul.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16070891dba69e---ruxupokarobum.pdfIn PDF document text
    • https://angkagenap.com/contents//files/kobaw.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/20336371087.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/xexefovorovuwisiv.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/86090050241.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/69265735191.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/sutilubepexidadurevawewum.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082b6432852d---63065083292.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/72456767936.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/zifodizijibuxirunoted.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/godakujumiguxu.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990abdf1d78---sutanovulukusevok.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/kovetipagez.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/rawurulurugowogokimam.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b40e1dc33d8---vebufamolebatined.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee0f3ccb8a---peleluwolalor.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210529_4233E4CEE06FCA95.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609d99be5b711---wemagenupexu.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/laxumopizasizaj.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/pezoribomun.pdfIn PDF document text
    • https://aashianarealty.com/file/39192294474.pdfIn PDF document text
    • 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_off0000ca81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA81 10484 bytes
SHA-256: 10f6515c4e2062167629f43ee69f70ad9ed9e585ccfdf466af320739a7fbcace
font_01_sfnt_off0000e25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6C 17264 bytes
SHA-256: 5e56216f9ca9090e6b3ab14f30c5508407ff3ee0f11f03954076b8bd9e69c7b6

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