Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1eb9078b46c5fd…

MALICIOUS

PDF

77.1 KB Created: 2021-09-18 03:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a4d2a1eca4264685304f31f46ca2b868 SHA-1: 12a203ee413352ccdc4f3a50f158d8a9ae754698 SHA-256: 3a1eb9078b46c5fd79bc5165e9d0a11ee268bf2f8e425437e38f82f9681731bd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest a phishing or content-luring campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sentralperdana.com/file/95889680366.pdf In PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/munojijizonilisamodojazes.pdfIn PDF document text
    • https://ms1oke.com/contents/files/mumaledusobi.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/verigasufugin.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/lukumidabames.pdfIn PDF document text
    • https://hirurgija.me/files/20390313626.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/65519082623.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/63821094486.pdfIn PDF document text
    • https://premiersuli.hu/files/files/85123323960.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/vesapiwalenu.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/25906058979.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/33035532572.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/15808038690.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/28770570936.pdfIn PDF document text
    • http://cobmedia.hu/include/13630676814.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/pezuzebe.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/fageguvupa.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/3p9iqae2m83ck76s5arl2u9gks/8344799579.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/27261007034.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/35274061995.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/13384197793.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/titejilakanivufejeli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=optional+product+pricing+examplePDF 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_off0000c039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC039 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84B 20472 bytes
SHA-256: ace7cd1b965a5148ee28bd25da81d3e2115b6006a1a0f5b1996dc5d84a658a97
font_02_sfnt_off00010db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB2 10916 bytes
SHA-256: b221cb861d0813674df85cb990b8d26451a488ef2ef964b3cada7dfecb83e420

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