Malicious PDF — malware analysis report

Static analysis result for SHA-256 865c9f69326d1b17…

MALICIOUS

PDF

82.2 KB Created: 2021-09-03 09:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 292d5ce868a4c0c4b8b0b6c2f2e68c4a SHA-1: 5c42efb9ba58f8bfb27e8de7de5d6190221f9f62 SHA-256: 865c9f69326d1b17dbf9bef80d80a30f19c06ee7e8a35d24eccb8c683d6c3fe1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

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://allytemp.ru/uplcv?utm_term=focus+current+affairs+magazine+pdf PDF link annotation
    • http://sacoorhealth.pt/site/upload/file/84824069879.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609892f0a59a2---wojelaluzenowedaruvetakil.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/4509915667.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/goxumofiv.pdfIn PDF document text
    • http://fygl.net/uploads/file/130203436189.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nadusotugu.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/a210530a07b5389cc025c0be6877f285/85318888140.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/0cc20c7b4bce1b63f860513244b1e4d3/6263345465.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/92437409481.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/85465914549.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ji5itr01839k8pqq6qtjeu0po2/julozegefu.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/wadud.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2eeba4382---50994292247.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/dokibiz.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607284fe0c936---88171740643.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948792ec189---56751359372.pdfIn PDF document text
    • http://bakoca.hu/files/file/92279443459.pdfIn PDF document text
    • http://allycatering.com/userfiles/dopifomuge.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/250be38fa52abdff890c7c5666491d14/32446002135.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210716060406.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/96714221910.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/9460358792.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_off0000d9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EE 17444 bytes
SHA-256: 26fa0fb460b4d207ac7d6d4f4831c5b0e71a7a81d7232cf4c726ae5316c4af99
font_01_sfnt_off000107a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A0 11052 bytes
SHA-256: e82da2feb6e95fff1def78554d79ba715af8f18fc30be1934b17e03a596ef926
font_02_sfnt_off00012135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12135 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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