Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58f3d5e6e5d9581…

MALICIOUS

PDF

92.2 KB Created: 2021-09-02 05:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a0cc43c5651a041376f8643630684df9 SHA-1: 9da3e06d6c275d17c39eb2425705a77dae7af50b SHA-256: b58f3d5e6e5d95812afd7c244afd4a2a2a307c5f6c5a53fe8a68fedf4a8352ca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute further malicious content. The 'SE_INVOICE_LURE' heuristic indicates the document may be disguised as an invoice or payment request to trick users into downloading the malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://garglob.ru/uplcv?utm_term=among+the+hidden+chapter+2+summary PDF link annotation
    • http://jjw-led.com/userfiles/file/lonuzuwuxativonemixezone.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/torakusubekev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b5300c9e5---sefibep.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/da6dcd436808f744050e7264fc85e929/43615633163.pdfIn PDF document text
    • http://maksimetall.ru/files/xiwedodusevazukovizurov.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/98716250285.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075f1c4b74a1---80831173670.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/fokurujetuvuvaxaresuva.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd8f495253---37521060255.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080adf4b4693---kazatopapumedegewomo.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e8501acec---bivawat.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893fb82349b---20394873827.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/46791198351.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/52400377417.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f73fb7f3a---juxidiresuli.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bb21c1f0a---soloxuxuloxizewebod.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/24f2ce24e464467bd9830f61c1a70b41/zifepuxilepodemaxuxasod.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab15323bb91---gaxozolonuboduxuvojov.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c085139f---98278050371.pdfIn PDF document text
    • https://ahha.az/userfiles/file/pupapumageluratogilijizi.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/mefid.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/8bd18cbab8eadcffdcce4b10af736d85/7020050369.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/sufivuxavalojosuwamijemot.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/fafefobapepojesude.pdfIn PDF document text
    • 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_off00010522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10522 16892 bytes
SHA-256: d6f061996a98b05f5a358b5b0c739cf3106d71f7b3787a36507c76bd9658ce81
font_01_sfnt_off00012ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001480d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480D 11232 bytes
SHA-256: 701b6c3817b0b9638bbf8705fa19ed780aad3abee065bcab3313edd310c30782

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