Malicious PDF — malware analysis report

Static analysis result for SHA-256 256d6f4224ee97e3…

MALICIOUS

PDF

112.4 KB Created: 2021-06-26 05:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 55e17b6d3be593c45158cb952d9c906c SHA-1: f0bf7fc10bbc623f51f5ba4425e78d1c671c807b SHA-256: 256d6f4224ee97e30ca4bfbe58d3b505b1a44b60450f076de23c78e365180098
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160708f3c785f4---mafutipiraxosidunibil.pdf In PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/421a54df973898e971393097a52d509d/78098480416.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/panulebexefex.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba4cd7eff3---doxexexugiwevegemavorepe.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/25f607b8a914bfb9e283c792c2bb0ea6/bapadinezi.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803d600affe---38066806722.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98e2c770b---volokugugowelebesodib.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/bageganotuxotod.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/j47nepajjqkmqscqb7md144tt6/43855662231.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/gimijafaduromumumitil.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/6750893606.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/505bb90e2db017ad01fb70be5ab7b603/54548860267.pdfIn PDF document text
    • http://www.asslar.de/downloads/5962283689.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825fb95bf35---46379095660.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/dewozumagemonilod.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/46668312363.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/37869793344.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/tozebuzila.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/014a1f078c9955a3930a4ce4f8f62d97/49758845192.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/notoloxileda.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/7qppplocrbh7bug6hpmv95md4n/85684077346.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086eddb9f6e1---zolatib.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f8465bb7---rovug.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/gadebabadovasobejiluse.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210531_800264E1CF7D3845.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=lord+voldemort+imagesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8D 10508 bytes
SHA-256: 4c75891585ca8497855e8dd1819942f265e44d2ff6b9f0acd710e31649078e40
font_01_sfnt_off00015345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15345 19104 bytes
SHA-256: 16c570a0a9e5ca35086ba2161e07e2bb221ed4f27c6ea32145f75320844fbd89
font_02_sfnt_off000184a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184A8 16208 bytes
SHA-256: 2f3fe951f676449c007eb4943798298cab6c0f5d949777e196d05408b3292a1c
font_03_sfnt_off00019a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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