Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98f57aa6e2a53a8…

MALICIOUS

PDF

84.4 KB Created: 2021-09-06 17:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 929c916b3f58186c0b3cedcc9bbd085a SHA-1: 3504b0bbd81b77dfe71cebb897664af8bf33992b SHA-256: d98f57aa6e2a53a867ee6342f2194ccd8987d829d6f5b8eb8b2632ed535465e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised websites and disposable hosting, suggesting a phishing or scam campaign. The presence of a link farm and the use of compromised CMS uploads are common tactics for distributing malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/4c142c71ade401129b72f9ec2c9b0533/5237284315.pdf In PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/99383569917.pdfIn PDF document text
    • http://ruresept.ru/files/file/71475704011.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a93092b27d3d6e09a4f4e50d68ae0579/86139747983.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074b72d13df6---62484498575.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/99514478434.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160af0d15d8835---taredojijoresipuwusuj.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/debebijolato.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/dubune.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/22510614375.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/fijodudubumibi.pdfIn PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/58319406340.pdfIn PDF document text
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/28519789102.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a689c615e86---35422608718.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a98513a55---mezolarifa.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddff70bc5d6---lapufaxagozujojusuramej.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/c74410e86462f3b373a2b04b259c3a41/zamomekovenejogapegep.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b86d4448b---mafifagawitojejaruzawewe.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/10520777750.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/b2b832bfcba556462e97df5bbfbc2263/mipalodojin.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/51867092533.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/wexoke.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/sabevux.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089a2d53d7da---rekakur.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/84547021595.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pittsburgh+modular+midi+3+manualPDF 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_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 18220 bytes
SHA-256: 3c224a8c25615a7e1a39344a2e5b82099e1db9c63a9bf028c8aa010d9522444d
font_01_sfnt_off00011309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11309 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B20 10976 bytes
SHA-256: c853d9654e396c3c4b2bd4e32257ec2ceb257d5f94d3f2788fd6bb9f23c477ea

Open this report in the interactive analyzer, or submit your own file for analysis.