Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bc00a8aed1e0f2…

MALICIOUS

PDF

116.5 KB Created: 2021-08-18 13:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d8f41947054f799f37236921f964be24 SHA-1: a04b07e58778fdf09b696a460fff68749afa28ea SHA-256: 02bc00a8aed1e0f2a851ffe2a68d4cc41419b53768f1b01e26243b6a9c41e247
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and embedded URLs point towards an attempt to redirect users to malicious content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/9f34a67c8b587fa1b0160a992367a1f1/bamepoxinesarovuzigexazo.pdf In PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c46fb64da---4308106980.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/45217587844.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/84446413562.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/jitezajatinudusijepuri.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/sdb3rq8uqk6a8456od4umq4rde/3299306908.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/nubagavasiraxabimem.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/likejibilukirewabojib.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/gavezegotapugon.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/9956713083.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/93330175952.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/gigaxureviratipuvawutunu.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab58ac22cfd---2082251667.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/pibopemusi.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/vuxamuwotowora.pdfIn PDF document text
    • https://motacademy.it/file/wizizudivudaviv.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/wibijesusub.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/kametumakosep.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/677e72e5084324bafb028b5b9a17da88/81630287309.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/0c8icvqvodvgna0f6edg7v96bg/63635871626.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b75f3ba0808---51660962150.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e2446d4562306ba03b83139f08672d55/20712410557.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da2ac18577e---49915396495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+god+bridge+in+bedwarsPDF 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_off00016857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16857 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18069 16764 bytes
SHA-256: 9d3a94669b1efa66945b516ef19bc4ec87f1add681100c8c4ce72b14d8bf7319
font_02_sfnt_off0001abf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABF3 10592 bytes
SHA-256: 1c2bb493fd174d108c8be3a50c8c1035633da4c29447e7c5303b0c917e2c70c9