Malicious PDF — malware analysis report

Static analysis result for SHA-256 122d95c547ffca45…

MALICIOUS

PDF

84.6 KB Created: 2021-08-21 18:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f5da612369201ac158f93e69445d2d51 SHA-1: e88641c9a59fd8843bcb253fb51a17edef254e94 SHA-256: 122d95c547ffca45afcd828c8b50235bc4e8bb2eaa1cb19ae6ff9112026268d1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and link farms pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://huntic.ru/uplcv?utm_term=remove+metadata+pdf+batch PDF link annotation
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/b809377ea001d2f66484b924a4fa6d07/gorefifudamewipavobafokam.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/60074bdb9bbbef955405b015ab60af3f/visalaj.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/wifipunuxekekopovekokuf.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/88918620065.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/rebumazu.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/75703266449.pdfIn PDF document text
    • http://araonline.hu/uploads/file/xagagotawajumi.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c95cee66ee2---49338770056.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/20045424401.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/44104065112.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/42492014022.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092a245dfcf7---dojivojob.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/doleliwojowolenefikon.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/b5813a007a033f59337858dfacad5eba/75917760324.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080f75c78dff---sidifumoxexilawazetajo.pdfIn PDF document text
    • http://liyangah.com/Upload/file/rolafoxekofugel.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/26385442370.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094019643ee5---51666030707.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/86a867f0a69f82d7a9db07fa8bd28848/wewulatezipodupoxumuno.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098b428b493f---83152697667.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/11148021225.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3848c85b76---91368470419.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_off0000e6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AC 17212 bytes
SHA-256: 00722f5a2e2bb73093279c64382127d3871e89089b7014cd03d7cf00ee3c4628
font_01_sfnt_off0001142e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C45 10624 bytes
SHA-256: d4f21e3c73c587b3c79eaab18830652588bfca771e89d683f89939b55d2ae64a

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