Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b5f1dd13c6dda1…

MALICIOUS

PDF

86.5 KB Created: 2021-09-05 03:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a7cda5d83e4d0937c7b39dd534ee2a8b SHA-1: 39e0836060ff0e6d17fc1b5e5d85624cc0625677 SHA-256: e3b5f1dd13c6dda172b90de06c28ea2332bbb2690352060cd329e1e31b971043
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content or phishing lures. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest it is designed to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607086ebbc799---99514199125.pdf In PDF document text
    • http://amadpich.com/userfiles/file/ratanulivosimigoseduk.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/78m28qaju5bog22jagd1uassvn/81666594501.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/wutupaduvaketuse.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fca2a2b8e84---rutatotanaxukovimoneti.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/11291752645.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/32445630554.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/15525031750.pdfIn PDF document text
    • http://doverhighschoolhalloffame.com/clients/2/2d/2d76883e1086210ef8e2c43836b0327f/File/18344453140.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/n1hfkt3ni2uvddnpjid5kjvqgm/68325005747.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881fad9a55b---52515866671.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/82042691740.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea5b0c439d---40652581817.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/6894919435.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c6ddcb4ca---nanogup.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/dipotexuxaxaz.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/4ebdqsgvnd44p6tt56nchs287m/43726945730.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/5140826438.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929ec54eece---kujuloxisijatib.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/22976427070.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/58050454146.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/bokogete.pdfIn PDF document text
    • https://nobelboya.com/userfiles/file/71621321574.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=redes+alimentarias+alternativas+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_off0000e6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 19996 bytes
SHA-256: 2106e6d59fb9469d759489d8800fe8fdf835ef62f035a610082132e326acf3ca
font_01_sfnt_off00011a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13252 10652 bytes
SHA-256: d559d59240a99dac5d5598a2e77ea6f09075749e103ad0c6d3edfc6ac2318d1a

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