Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a94d6bf9b4c10f2…

MALICIOUS

PDF

88.6 KB Created: 2021-08-24 16:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 174841fc09f3fcce96979e972d59cd88 SHA-1: 76b9bf95168251e7d9ab3426d524b91bf543e5ce SHA-256: 9a94d6bf9b4c10f2716f71286c6fb3c814acd17b329a43c60d39ea83924baf1f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting. The heuristic 'SE_URGENCY_LURE' suggests the document may contain language intended to create a false sense of urgency, further supporting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://modnyi-buket.ru/uploads/files/peluradoboxepi.pdf In PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c30a13ea2f---tibubudetetororagu.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/99207317262.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611010f38e9e5---rovujalo.pdfIn PDF document text
    • http://gabortech.com/admin/file/degigix.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/beromirokawizixibilawan.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/5545142246.pdfIn PDF document text
    • http://imi.vc/upload/files/77301975321.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/89039830176.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/cb7c4413da19fc63510d74be8faf44b2/jusaw.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/92074160390.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a3053e6e976---86643185571.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748f91b7558---8605826511.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/35017294280.pdfIn PDF document text
    • https://tl-systems.hu/files/files/jixilunumivevibi.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075024c9b85c---62466639693.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/69074137790.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/87573859268.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/8eee5d4d0ecf451a4a8f4e4bf8c83848/35787315712.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ffafe6d1a---judune.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=the+golden+goblet+summaryPDF 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_off0000f54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D60 17596 bytes
SHA-256: 9de32ca7853b7bea9c3fd3145efb99d7772b559a13309d827b8bfb3d06282682
font_02_sfnt_off00013bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB0 10920 bytes
SHA-256: 8ff8d5c0aaffa1ea81e940eb23942ed5e66e6225dc09f59c18904fb6cc588667

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