Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ade37aa3c099de5…

MALICIOUS

PDF

93.0 KB Created: 2021-06-28 21:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6bda25a3f0a0833081d03253c849214d SHA-1: 7fd52e2936da95780deea52cfa4d5daf06c4380f SHA-256: 5ade37aa3c099de5ca3996f5f8735d49f1ca6645284bb10bc4d9be0dc6710ebf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://philabc.ru/uplcv?utm_term=high+republic+a+test+of+courage PDF link annotation
    • https://istanajp2.com/contents//files/43089890782.pdfIn PDF document text
    • http://vejwun.cz/images/mavujod.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16078ca9f11809---jozixukum.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a2687260d15---noketosarixinuposipinux.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/678925ebd30cd112aa09bf71c5f6dcb7/tozivodeloguvuzinerogebot.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/69250026241.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/podopu.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/rgr2tgplci95qs9lukigq0off3/pezuboteleno.pdfIn PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/56876838435.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f0f12d3ce---dozotumadijivi.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160d31f0a76321---watadunam.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b08a744f816---76267772775.pdfIn PDF document text
    • http://candientushinko.com/images/file/39678319355.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1767724e1---47645961131.pdfIn PDF document text
    • http://sam-global.ch/files/file/2355434172.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/d9697d31b2286831b7bdb20bf40da616/11386713155.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/6l17sg9nlcj829pndc79ickiu5/gakufijekiluva.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/totajuwolakujewonapimokun.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f9900e20e---petujekememebesak.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/43741604274.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/79n4i47b4pgmhe2fmq3j8crf58/gefaxizobizuvex.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/nebevopoza.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/favoxi.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b070fda824b---davefunoripaluz.pdfIn PDF document text
    • 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_off00010927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10927 17124 bytes
SHA-256: 3989a5bb3c720832fccb7fd50cd8bc0b51a25e14d771490bef6aefbd06c7591e
font_01_sfnt_off000135e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E5 10888 bytes
SHA-256: f7df95c18f42a45ee3981d9d59b68c50cf0890e9595e87592dc39039a483059a
font_02_sfnt_off00014ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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