Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7e45f12dc03ec8…

MALICIOUS

PDF

99.9 KB Created: 2021-07-05 03:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7726f41cb522c4621a8d89d65a9f19ae SHA-1: ead58c044c50d7f382a726238de7486f044ef22c SHA-256: 3e7e45f12dc03ec84b9408f15a95166efb77699ef089d3d79efe6e87e1f8dfd2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress upload directories or disposable hosting. The primary purpose seems to be directing users to these external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://123natura.com/stockages/files/28335833166.pdf In PDF document text
    • http://usmleworkout.com/files/file/dokitobape.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/kunaburiw.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/22288010900.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/3hugpsjp02douhn75ffg6aruio/wefisigikemomejo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609633e5cf433---12055428752.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/83897107609.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607026a2958da---36747606473.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/12652138360.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/putivofexomifaxo.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/37600462904.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/6490bc0178a0b8b00530b229e1c3d6c3/12699154579.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/90378eb7ba11d693c56a99c4e8ad79da/vizetakinu.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/6f57710358705a2ac65dabf28b04bc96/14002080917.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/temedin.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/37e298e6fd5c0445e27737bd9935fbb4/suzozegid.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dd31ccb6c---jibikizileleponevo.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/3tq6li8uo7h7g2d1krbv44pvv2/99127726461.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/dufuwusesewe.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abad7782987---8409287041.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081e0721b551---94309043570.pdfIn PDF document text
    • http://519pf.com/userfiles/files/31162449850.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=japanese+father+in+law+sePDF 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_off0001246d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246D 10412 bytes
SHA-256: 0ca11ee883c3a77cccce0c9884f39ce352ef29f8b217f66c6c3792a91608cef5
font_01_sfnt_off00013bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFE 17444 bytes
SHA-256: 52e3b86cbf13885565b3f0b719949babdd94db93bb8f44f96583455019f9ad33
font_02_sfnt_off0001692b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1692B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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