Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e1181e8be9ce96…

MALICIOUS

PDF

98.4 KB Created: 2021-07-31 23:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 5c798d598a13701e43358c3a642cf50f SHA-1: 811505aee19b65f7b5f3526188a23cd9298b56d8 SHA-256: 24e1181e8be9ce96ce32fcc3cda71fe34838e8cf7807e2a7de45083089beaae3
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body is unreadable, but the presence of a link farm and compromised CMS uploads points to an attack pattern designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/pcl2d0f2jf5h3mncd3k2k2hft6/84947366219.pdf In PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/272bdf4fbc9d13a06ea91ff95118d30f/39945860136.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/9fc37c5e9b39af677846fc94c5e4ddba/sujeduterejifafufik.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8912566b---letuwoxuwiki.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b54d2853a---98529955900.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/74423358149.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9053a69069---texutekaxeramevelisudab.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bb9fda513---kuwomepezatalumeguku.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/26408129687.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/teposesegurin.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/94212057506.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-17/20210617011142167397.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c13d2a09c86---73644321174.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/jedivev.pdfIn PDF document text
    • http://betaempire.com/uploads/userfiles/file/file/67925709205.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076d82721bd6---muwejokesidugafa.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/bovotobapixa.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/30383620211.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021051706140446.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16070b1f5e07ff---donizogawudofenilumig.pdfIn PDF document text
    • http://exantusfamilyreunion.com/clients/9/96/968554593547eb574606130639276270/File/jotokevuzogojosole.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/83je7ba4rrc4vr3sqknsg7vvgu/2277878353.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1216194fdd---21050560180.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/16548282633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=slavery+in+america+webquest+answer+keyPDF 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_off00011cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF5 11092 bytes
SHA-256: 327176f3d07063298a15721b398ef28ab007f7dfb0edfbf94531d0630637bb9b
font_01_sfnt_off000136e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF6 17144 bytes
SHA-256: b79fdf48ae5d01e8389042e53b83c0fc51d70050dfd6f14c11b20735caad4d88

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