Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2183f27d2315a0…

MALICIOUS

PDF

83.6 KB Created: 2021-09-05 02:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 137db3d3e39c95978fd8f584aa206c2e SHA-1: abfed1a82b1cf5488ed9fc4300f392cc6cb0e8c0 SHA-256: 3d2183f27d2315a0eef3cfc075fe99e03fef9aafd9968143f8f8e4bae9c27b9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's used to distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/539bb66b8277a194fdcdf1142b8a1438/jobazulajeniw.pdf In PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/h0rmeko0iqirn1eah8tof5ie8g/17285748177.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/82219433278.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/43122422567.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/98178160064.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/bi1pjnhhp201fu9j8pk79osk0p/jolexisebuwufetipilutu.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ota7330tto7331m41k5eiv1vo5/zusuzupijipowe.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/mibajoviwipif.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608540dc5c635---89660581086.pdfIn PDF document text
    • http://gartenmessebau.de/uploads/files/3525939068.pdfIn PDF document text
    • https://discoverthesky.it/file/6706890553.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/nuzesaxerolikob.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/05d587e7d5f73275722867155d772538/43810741602.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9f7a2ffb9---68775710185.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/dijak.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/26122163213.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/644b2f13a1473866b7c894c85fa4572e/piram.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/reweravo.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/o60a1t3mdoq6orvp2qb585gmbq/kadabi.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/latizefuvafora.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e5f6931d608---74546897573.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/salitezit.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/vizabozewedugoteze.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ceb385a58---vukajukizemilewit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=tablas+de+frecuencia+para+datos+no+agrupados+pdfPDF 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_off0000dd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2D 10996 bytes
SHA-256: 20c41c41f3cd85ff67d501794f1d5599dc86202f998e897f2ab0ff8b7bb00d89
font_01_sfnt_off0000f66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66B 19268 bytes
SHA-256: 258b96e97a6efa81c02c52dcc114f3121b379039b9429b81a983921d8ba30adf
font_02_sfnt_off000127e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1