Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba93f8df617521f7…

MALICIOUS

PDF

86.1 KB Created: 2021-07-04 09:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b9940f1a568d796b1ee7558f3c186d96 SHA-1: 23a487291f4f836b45eae4e435938f5a2ea2dbb7 SHA-256: ba93f8df617521f79e14c97037ad5a768bbe8eccc88883ede7afc59e5b4a4985
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous links, many pointing to compromised WordPress uploads or disposable hosting, suggesting it functions as a link farm to redirect users to malicious sites. The presence of external URIs and the overall structure strongly suggest an attempt to lure users to external resources, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://praguetransfer.com/files/file/50857822111.pdf In PDF document text
    • https://angkoronetour.com/userfiles/file/18683851175.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/29186162655.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c29211ac42---20038301082.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/40462984980.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/7259fa0aee0c3c4e2d9447a8cda8ea31/korudakebaf.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/14605ebf67969bf1de163a48e3391300/dudani.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6ee45028f---41634942058.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d3933e6adda---33565635820.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/77c3c87b7b5fba4e95434024314b29fb/nijudamafetosol.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc789ca3bd---zororazen.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9f626b6b1---xozotu.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/rewagodixaw.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e978ac095---14184092360.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/dunewor.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7746cae22---jefijakoturapig.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/vajedofitiwolovotutofuw.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/4bebbd9d2ecf7a178377b6cb9df6c5dc/14484936598.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/f8500336a6f8f4a46af61cc034ff261d/rononupumojumefibebetag.pdfIn PDF document text
    • http://chinahongji.com/d/files/53734740027.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/33501027633.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a1eae945e---lurutipogobifutipawowe.pdfIn PDF document text
    • https://alutat.com/data/file/15689601849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=right+off+the+bat+meaningPDF 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_off0000ec0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0E 18372 bytes
SHA-256: a2c34b88e9ad0ddcafdd0d477484bc781a107f589a9caa317be42d7acc86ed2b
font_01_sfnt_off00011bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB6 10532 bytes
SHA-256: 567f2ae0265eaee2236e5e37599c912ad77b850bcfa044079051ef3c7f699794
font_02_sfnt_off0001338a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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