Malicious PDF — malware analysis report

Static analysis result for SHA-256 2069798a6077fa47…

MALICIOUS

PDF

81.5 KB Created: 2021-09-15 19:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f5273d3cf12c5edf6e3c53f9a0d34562 SHA-1: 1d4887ad4d9fa822b80737c79cabb4572a9729f3 SHA-256: 2069798a6077fa47e285ae8d5ef1c8e70a7e42932adec6253a1cbc8a82e9dbf2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to redirect to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=watch+nomadland+free+online PDF link annotation
    • http://homestationrealty.com/userfiles/files/maxopafezinefajenuti.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/62636679151.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109102358435075.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/10458615440.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/83042349057.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090708504473499.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/jojak.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021091200465512.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/50776746506.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/gigebula.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/73780855505.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/safadiwizikumikitanonoz.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/mezixuridibeki.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/88838883961.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/mofexolol.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4905407c4---dogumukolubo.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/jabawezesozosegowaduda.pdfIn PDF document text
    • http://theofficeplus.com/userfiles/file/jozepumokodivul.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/42685406417.pdfIn PDF document text
    • https://kakakmanis.com/contents/files/gupedikazupirefuruxebad.pdfIn PDF document text
    • http://accronline.com/userfiles/file/bavigalugotedonujusulub.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/fizunomolizojade.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/34922032282.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_off0000d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 17900 bytes
SHA-256: e90172e2764ca1035cbe84c9428ffeae457d8ffb996b508a0b14abb8a8a230b2
font_01_sfnt_off00010835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10835 10568 bytes
SHA-256: 6110195704a6df1bda2588ec0eb4b386fda7641e821b9660dcc8cd06a72cd16c
font_02_sfnt_off0001201b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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