Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d312a298924cdcb…

MALICIOUS

PDF

78.1 KB Created: 2021-09-04 16:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8ffe6a155ab3d925edc3fccc43d55d0d SHA-1: 82fc5b1961a773d8479f2b424109988cfdcc195a SHA-256: 1d312a298924cdcbbdb5bfe0ea936df2a437818a04763d05483bd6558a7999e3
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/b18924e2b41871472ae7e7bd7b828b0f/kibezobiwuredunesopaniteb.pdf In PDF document text
    • https://debcopharma.com/userfiles/file/95860703735.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b425ea62893---totesugoranu.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/c76123ed14aa949334e65327043a7db0/rubenokabipiwurewu.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bc41603bd---56836321811.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/99818124443.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/meftfoopeims61do142o51veii/22514635233.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/6v2roeq467uodihgv95dvq2kpl/76604220695.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210519012042.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/5596d9dcced2fcaf29f451d7fa13f991/48800678516.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/pvjjfqvffqqup05jk2lkljbrja/19629925407.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b38fc589e6---larelulawemixoxosa.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108f21b2678b.pdfIn PDF document text
    • http://cocoal.com/uploads/file/74953389122.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/gakazar.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/72811878620.pdfIn PDF document text
    • https://dafelia.com/files/59935958619.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6085991e7---zogokiloxazaz.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160af3f8a71389---pujovazaxojonujudezepi.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/wixuxedalipi.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/wonunite.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/6172597294.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=jaguar+xj8+workshop+manual+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_off0000cb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB36 17548 bytes
SHA-256: 09e90b4d7df96729e025f91b0aa3d6bd0ded839bc612c4dccf7d2f605f524286
font_01_sfnt_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11110 11332 bytes
SHA-256: 62caa24e15767c86d52a71148c21ee25560c3b821c18337f9b4991122135f4f2

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