Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b82b30f7a299ca…

MALICIOUS

PDF

148.1 KB Created: 2021-07-24 00:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ac13b25e2e6148ce9ba2d682be88294a SHA-1: 3e85917dafc754ecbef029a339438943c1f13e14 SHA-256: 24b82b30f7a299ca37b6234ca1f02760acc5d91bb985b4bfd043835ca51f585c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9768

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 http://bebelino.ru/userfiles/file/47701014773.pdf In PDF document text
    • http://www.moyekolodin.com/files/35073556871.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f15497430a6---nesul.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/13410778034.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a755715810d---fikilevubuk.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/34363620600.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb0be53c99---36620464017.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/16260995471839942587.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/legoxolejifidexe.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/6f006785c1fff7719f0795f509dbf4ce/tawin.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/ubn2dngvc0n4ve9rsqf49vg03d/jitijegi.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/28shpvfk54eq6q66q9sv3875n0/judetelegebubezibelifiva.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/supazasuvomawojut.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077976d1e917---21277822639.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/5576a2669c0f96e9a10b82ae82b78077/19146936609.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c09c6a54ce57ae8f9d48e108c2366da9/zojaluwososup.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/b5cab88d15fa466ec3891e6fe3468771/wokawo.pdfIn PDF document text
    • http://metallpress.ru/files/48534208274.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/rukojevedixavagimogumole.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb0d942fac---71506985842.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f83360ef65c---debegolaxuvapedekuta.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/3fc1effddbccae8f37f587ee887dde78/76281081699.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=yo+kai+watch+3+fusion+questPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1F9 5684 bytes
SHA-256: 89794a1c90dbb23cfba7ed054009b31ea14dde207dfd83600081336e09714d6c
font_01_sfnt_off0001c67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C67D 19504 bytes
SHA-256: 5e7fc77e78256750b9724c950a2e197a1b1eae7096730a645439ed708be0df8f
font_02_sfnt_off0001f9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9CE 10868 bytes
SHA-256: c601a10a3b7279d107debff9aa52af04b24ec8a4671d17c85dca59592a1f352e
font_03_sfnt_off00021309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21309 16208 bytes
SHA-256: cc18dd29c0e954ccb64aafd737ebae4efd7f61c45ca6cadf77ebf227b688c97a
font_04_sfnt_off000228cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x228CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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