Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce94c2a10b055002…

MALICIOUS

PDF

82.3 KB Created: 2021-09-17 07:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 928d626087b35b69bec4471567260743 SHA-1: 60590a028fce8efa9fc1ef41217271cf3957e712 SHA-256: ce94c2a10b055002a1217c1a6a3cd2b94ddfedfc71f68354a730fc69e9de278e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of external URIs and link farms strongly suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://smidgel.ru/uplcv?utm_term=coding+games+in+scratch+pdf+download PDF link annotation
    • http://aotwresort.org/ckfinder/userfiles/files/81677843824.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7179ea672---34139945077.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131192727eda---23403095594.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/77751738800.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/55698324594.pdfIn PDF document text
    • http://kcpsystem.com/userData/board/file/21824788165.pdfIn PDF document text
    • https://adikketiga.com/contents/files/39604889708.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/21340808655.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/3828057815.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/18930986307.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/monugifesabibi.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b0016c017---89317940407.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/92107317537.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/xofodoramodixiwebok.pdfIn PDF document text
    • https://aedwea.com/upload/foto/76678293923.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/gelidabapob.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360229d0369---36218342623.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/devigupaduzapon.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/55981866961.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe02b57d0d---81449609209.pdfIn PDF document text
    • https://petikdaun.com/contents/files/zasifirazewamidurutebavox.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/jibabesozit.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138326504c95---28082951949.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_off0000d90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF122 11184 bytes
SHA-256: d461bf431b7bad163f3f45249e99b1bcc51bd95cc0f4e4c58f4fa96773b4a626
font_02_sfnt_off00010af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF0 18680 bytes
SHA-256: 7632afc18a1a05a33a5839e4742bb2e0bb5898cb1ceb3bfa3c0a06f3ad4f5311

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