Malicious PDF — malware analysis report

Static analysis result for SHA-256 048b2af2b065972d…

MALICIOUS

PDF

82.1 KB Created: 2021-09-19 00:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2134cbfb2cac963f13cbed3229ad9bb2 SHA-1: 126a809ebd0f57bc84b64c1be5e8e55ba48877e1 SHA-256: 048b2af2b065972dcc0581ea4180f3272a60b131de64048050ce7d5147d57775
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable domains and are structured to appear as search results or file downloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a link farm intended to deceive users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://www.sherpachristain.org.np/ckfinder/userfiles/files/nerupepuwirofimajofi.pdf In PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210919060304.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/24639178429.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/tarefotalo.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/datakubizu.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/daposobevilevelu.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/95112858904.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/zidab.pdfIn PDF document text
    • https://nocnepal.org.np/ckfinder/userfiles/files/9269333378.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613031f63b494---kofutemekusepomavojidag.pdfIn PDF document text
    • http://barefoot.pl/userfiles/file/16739650113.pdfIn PDF document text
    • https://ebooksweb.net/files/file/boroniza.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/kajapavo.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/15010495658.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/wekarusagigetasawarofapeb.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/lumisikikigim.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/42659944835.pdfIn PDF document text
    • http://cwpni.com/userData/ebizro_board/file/xakan.pdfIn PDF document text
    • http://gibisch.com/files/files/69454378550.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/8991627743.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/91496002511.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/fajunojefet.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/19540899874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=man+utd+live+stream+now+freePDF 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_off0000da49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 10760 bytes
SHA-256: 93c7d8d0420f6e589b87692ffd3d8aebb7edd122009600c9588087ef822d38da
font_02_sfnt_off00010b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2F 18244 bytes
SHA-256: f6be9b2c84166e64b3fcaa247ea62a726aa8c8e269a5ecd9d570a780b1099558

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