Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7062ae981960eae…

MALICIOUS

PDF

71.6 KB Created: 2021-10-01 12:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 530c5ff4ea53307e6be2726e6960f592 SHA-1: 3f9980fcea8a1fafce2516f09581ef5a1f53839e SHA-256: f7062ae981960eaea9214246e9034bbd7d1cfd4b5fa1fffbe5e3e63115120bfd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://fcraregistration.com/UploadedData/file/30411675149.pdf In PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151fb0125c07---xuziwagafalujug.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c76433f975---20778793393.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/bovomi.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/e3612f98d515d110c73c67c24c22dbc8/18321293998.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/89706014800.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/9e4ri6m2nrpr8ct12hr71g80rf/73264980215.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/dewarunedelosiz.pdfIn PDF document text
    • https://alertsecurity.in/ckfinder/userfiles/files/38570379114.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/kudafuju.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/161504905bd9da---kimiwexidebuxok.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/32668977091.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/12345113020.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/86857044928.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/28788554551.pdfIn PDF document text
    • https://denimder.org/resimler/files/puwilol.pdfIn PDF document text
    • http://gaineyranchaz.com/userimages/kunedut.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614530ca1bf78---27272092456.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/46637604653.pdfIn PDF document text
    • http://moneymaker-gold.de/files/46366837395.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/fbd898b25be53bf632547cc0cac2a908/fetibidenaj.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109241159191429.pdfIn PDF document text
    • http://wamer.org/userfiles/file/42124643218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=her+full+movie+123moviesPDF 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_off0000b520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB520 10512 bytes
SHA-256: 60d1274312956c6fbdcbf7dd1a3d484ad5c8742a9ae79de50b659ac3e06af0ff
font_01_sfnt_off0000cd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD25 16956 bytes
SHA-256: 5e61f2cf475c8038a0d6ee91c428f17f8ffff099ac058da576792c88018ef0bd
font_02_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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