Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f304ede538b306c…

MALICIOUS

PDF

78.5 KB Created: 2021-09-05 17:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c346eaaeb73b4f75cdd333b7926b85fb SHA-1: 71653bddf9705f54af867524a56d0b3b14e5af07 SHA-256: 9f304ede538b306cb2609195c6bf041582911432beae7332f3d17f2efae0b34c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of these links indicates an attempt to direct users to potentially harmful external content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/b6c250095108b0b4aa543ebbd0602356/gadusuposinomid.pdf In PDF document text
    • http://jcpingie.be/public/files/38222418866.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/53673209308.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/pevutisivovumonew.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/redojomilesozeso.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a62ffa1b291---12779670847.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c60b6928337---weranomo.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/sugatemoxakiregunovaf.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/2632590402.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092769f2018b---19673546254.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607399d5f36d4---leguvalefasadove.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/sojedijowixosenomuliwatag.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/445a5sop0t1j7tc20j0k8fcl3i/nobozenususodiza.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e45ca3fcb2---rawabanifedudomitaxugozat.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611f889614a9f---wojorexekar.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/v0ues2309cfh5aa88mto05jpaq/bunud.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/7337508452.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/wikujiniwumuvotamul.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc267588c3b---janivemiz.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-08-09/images/files/88247617363.pdfIn PDF document text
    • https://anakmeong.com/contents//files/povutiloxewosi.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/639p60s1nbj88p30np1frr4vrq/27208315862.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770e1bee72f---gugavinujatibagakuzorab.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/l7h4st1mm2506a9qrsv71hpjl0/16710731779.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddbe0f3176---nalun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=handwriting+practice+worksheets+first+gradePDF 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_off0000cad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD4 17724 bytes
SHA-256: bee457c9915d8eaba0661a63d42ee49ecc6cdb2714dec2bb53fd6ed9e7d717ce
font_01_sfnt_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001113f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113F 11020 bytes
SHA-256: 9189a73e2d4eb64a1965d68e93267db9a92ca1325ec32ba034cae6c617ffa64b

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