Malicious PDF — malware analysis report

Static analysis result for SHA-256 009ef587aa2bcb6c…

MALICIOUS

PDF

82.8 KB Created: 2021-09-08 07:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 303c004acc8dcbcb2269f4993c9056dd SHA-1: dbf3e21c409059247dd4d1257a30cf0a4ce56fae SHA-256: 009ef587aa2bcb6c6e9b27dbfe3a9e4e0acdf34b1eb27509b296e912d1629452
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://garglob.ru/uplcv?utm_term=the+book+of+dust+volume+1+pdf PDF link annotation
    • https://arrayamed.com/userfiles/file/75747693470.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/kunuxemuvawomivuzu.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce45612b5e---wasumesin.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/kawobotu.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608776a79f776---noledeniladazajapol.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/96647601942.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/serokituvoxawe.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160963bee0ba28---40314903659.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60d332fabb---36542006573.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a581d5788---xujozovaxopenukopa.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/47722447e084234f9480ada1c01aa3ab/lalazurumokizefude.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/37161619165.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/bimovefeminupatifudunes.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/bizipawuwumowafe.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/bupusejukoninufametewoseg.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/fesuvirigonuwemalukaj.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/dd90822ebe285ac11f065e83066e1b39/83785337634.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/92021642722.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/4510941380.pdfIn PDF document text
    • http://nature-revive.org/files/file/86075275460.pdfIn PDF document text
    • http://esangsok.com/upfile/files/68171400605.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/85715282628.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_off0000dd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 18308 bytes
SHA-256: 162dae3498b338b14618d9ef6ee895f22dc512b6cf5aa246c561dd2d2d564d5a
font_02_sfnt_off00012504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12504 10720 bytes
SHA-256: f2e4d0904ad9d4e2051b09cb6fafaf17bb6612492c62d4d9184f629f96b656e1

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