Malicious PDF — malware analysis report

Static analysis result for SHA-256 40d030a5c159692e…

MALICIOUS

PDF

93.9 KB Created: 2021-07-29 19:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 219d532b776df7ae7f3c34952f036263 SHA-1: 629d1cc3d32679350e3982b7105036b5e810f2e9 SHA-256: 40d030a5c159692ecce3786c8105b9d97dfa502b20ec2b146315a26d9994e6d3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised CMS uploads or disposable hosting. The presence of these links suggests an intent to redirect users to potentially malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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
  • 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://huntic.ru/uplcv?utm_term=cours+de+math+tronc+commun+scientifique+maroc+pdf PDF link annotation
    • https://simon-daulte.com/ckfinder/userfiles/files/varepososizigefukima.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/29761854021.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16233523079281.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/10f9dffef2922f5c461859860ad003f0/dufoturobevupu.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c100c2b6cf9---puxomatomukumarotitugi.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/9659140880.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2149856b7---17302714331.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/31117683175.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/27939248012.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/587b1a4402c846195ace83916f6afc74/29468932864.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/dasubomejoxugitufepopew.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d4a04c322---48554354164.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/96435477864.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070934747202---mepumafa.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094337b1b5c4---33633231974.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/renuvexe.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae55666a441---60634797008.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/72389449257.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/n5sfo03mrhshus3cinb3giafgk/zavigupazef.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/29098757688.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4887123907.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/pugonedamaporaw.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f692fbc6af3e38cd5947c07891883f6/veseduvalasaga.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/gutokamaxumidud.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF075 18232 bytes
SHA-256: 0514e52ae9619e311c7e854adda3fc2fc8265c3328884a90de452730a5ca4b21
font_01_sfnt_off00011dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEC 16556 bytes
SHA-256: 19dbcff7cabc3724fe851c34e53efa5c0ad55f26022d92071e88aaa31f31d7d0
font_02_sfnt_off0001353f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353F 11116 bytes
SHA-256: 2f2512483781b24dbd13fa6be442cbaeec9620e1d47c22298074096491a62f5b
font_03_sfnt_off00014ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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