Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed4afe76c31c893…

MALICIOUS

PDF

84.9 KB Created: 2021-07-02 23:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 82218336bf677c8b49f127544f8b5aad SHA-1: b20f540cab5d6645dc4aaae9122b1ab685e0b046 SHA-256: 9ed4afe76c31c8932bf52ea325c9a9f55d79ad0d2692b876f4fa92c0d276703f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://laborke.ru/uplcv?utm_term=angel+cards+yes+or+no
    • http://denki-shonan.com/uploadsfile/pukibiketekopelijese.pdf
    • http://aardbeienfeesten.nl/uploadimages/files/livowo.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/4d95cc22e899aa844a441354595178ce/jisavi.pdf
    • https://apsco.ly/userfiles/files/51945023061.pdf
    • http://project-lovcen.me/userfiles/file/61241225686.pdf
    • https://idd.no/ckfinder/userfiles/files/29979227540.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/cf50a109c1d63d2b1928976b1cb87ba5/ledilofetixaforadij.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1eb0f144f---duxelivinibakaweradu.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5ba135d9a92213782defaaad9da0f391/katededisomogarajamij.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b843eb24097---8691595948.pdf
    • http://vinmexindia.com/uploads/99868733045.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ca124ef2f---suvopunakikaxogetodebudon.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/p7m5fgpa4u6aoq5n6p5feeqep0/68110049155.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/nukaqug78it8cupd2b2nlh1k4m/fifujamin.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607014e0a2acc---xadajiro.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072626b2d1c9---8098470236.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/658c0c38febd9a4534649d64215564ba/72863009991.pdf
    • http://www.allatpatikapecs.hu/images/file/doxesewiju.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb9a23b628---pojamagagopolopogeli.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/81291a8b1aaee9cf17ae174c80008c4c/siratakuronazegop.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/1355d172f544f6a795353ca96b7059ca/11180824032.pdf
    • http://roland-toys.eu/userfiles/file/jitodinamiriworafipova.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e896.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE896 16792 bytes
font_01_sfnt_off000100a8.bin
20488e16ace9c26b7f1b648af7143f8711000aa6018d814b2f00499feffb77a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100A8 17804 bytes
font_02_sfnt_off00012f1b.bin
027237b3d132dc22f535261ac6b04df0459f117b73f3930d91bbc7ad20344d16
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1B 10452 bytes