Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afe8d9f3d71514a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-05 15:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f10b0ef29e643db6cf1160e2bd4a3235 SHA-1: 02df16a81477dc5e113ded06c4e3b44be98be152 SHA-256: 7afe8d9f3d71514a345156b8b415d4df037adf34b324378cf3f54a578a3baa1b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised websites or domains that appear to be disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and the nature of the URLs suggest it's designed to lure users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://abnicum.com/files/file/54116465762.pdf In PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/lorasoba.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/54598996182.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/pirarejiwovuzulalogod.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/5ohec0bp6ulq6uq8cn38ge2n51/76459302492.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/14988832422.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0dcabbd28---pexomuluweri.pdfIn PDF document text
    • https://promise-land.com/upload/file/rewoxalozimapapuwefa.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7ec89bd80---belimijujuro.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/6cba2e5ccf6b2024537e8a89c410f841/59239466442.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/kijenidexupi.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/35614040249.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/tomatepu.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/3d1b3522a22fac4b256a6935ed776cf0/sigosejovukebizisoxogub.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800fea4a0b4---15102553022.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/xipozabi.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/rapokekekura.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/rosesikadiwugorefekivure.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/51203015856.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/44634614656.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fb802315044---penuraxipobagofulelipir.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/tekewa.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/bufumaga.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/35947fd70e1e12eaf07551753ca6eb2f/fuvatarolot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=financial+mathematics+for+actuaries+wai-sum+chan+pdfPDF 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_off0000d4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A9 11080 bytes
SHA-256: 61d09e9b5fa3404b781165ae45c5bbd48524ee026b996f390927b9f2b7b54f2d
font_01_sfnt_off0000ee54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE54 19412 bytes
SHA-256: 70c81cfe41c5bf0999f79a7a1c723344acf1cc7e250bfad83afb1b10044c9691
font_02_sfnt_off000121ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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