Malicious PDF — malware analysis report

Static analysis result for SHA-256 707a6ebec2b153eb…

MALICIOUS

PDF

97.6 KB Created: 2021-09-02 13:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a9eec71047ec5ba2ede458b317351213 SHA-1: c48c1e311a5ce9cba5d820d07794170239d141af SHA-256: 707a6ebec2b153eb3edf3816b189b528b39833bb1c83f205a7578758f8545cd1
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm or phishing lure. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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 http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612e39c3e6fc3---pukularalunok.pdf In PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/ro7nbreju8srjr84ibgsnujoas/443685938.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611a991762bfd---dixixumokumixotideje.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/drv22bu72r7h1jpliqmn2cg9v3/wofusuxikibim.pdfIn PDF document text
    • http://healingpawswisconsin.org/clients/a/a9/a991db820639e3552774ed9a746c1e3b/File/sitonixenonupumawipurokap.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/guduzodozotezepal.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/53835224972.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/83397393380.pdfIn PDF document text
    • https://tpk-m.ru/files/file/sawovadikatokupuduxag.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612174145a609---sipiminomomoburafusufi.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd23d41e6e---61837614829.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/55646780175.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/74185656242.pdfIn PDF document text
    • http://coumert.com/images/file/58476348205.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160903f4963525---27232277850.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/xalufelorisaxinezosuj.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/wapunezifasagok.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/bivesexivud.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861bd97f74c---visukuxar.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b416d7df1e5---vokexemulujebe.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/48168087913.pdfIn PDF document text
    • http://ccshecea.org/upload/files/gusutar.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16099b3d7d8580---2278183430.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d0f5cf209---89517657660.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/vegikevof.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/48307756860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=customer+satisfaction+and+customer+loyalty+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_off00011703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11703 11024 bytes
SHA-256: ef9804c40a1e6a0aa04aa3dae98152c1d56829ea58bf57037ec37a59fc853c71
font_01_sfnt_off000130b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000148c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C9 18236 bytes
SHA-256: 8fc6376dba8c5751a650ef8414d72842c47e62dcef7af38700e63631a25c17ba