Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6b4715fca7f046…

MALICIOUS

PDF

96.0 KB Created: 2021-06-25 19:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61b8012ce9565bb52ee1da17afa7c4b4 SHA-1: 424f6bd64be5f9a845ad78e70bf6301fd527eaf5 SHA-256: 6e6b4715fca7f046ebb98fb7b48ac1a0a8521554a267d3c0495a56675d73a68e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains a link farm with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for malicious content. The document body is unreadable, but the heuristics strongly suggest a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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
  • 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://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a11b402c89d---sesewowavijepep.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7900754525---82615148576.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/7a033efef2dd5dc1ef04528f44a4aecf/85823613310.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/hju5jtl0m0lctmb8r110ll7m3a/vamezedi.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160d46c97a5ae1---63769916762.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755c380345a---73792732342.pdf
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/14141803848.pdf
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/gagare.pdf
    • http://files.ibiza-ferien.de/file/junuxipujipuzomexupakize.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/2fd200b7036cc155ec0e4dd66e7a76c3/pisuz.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160764a6bab649---379446865.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160853d2aa004c---75971109336.pdf
    • http://uptownherndon.com/uploads/files/78096851881.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8a1a16df0---87124750644.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4121b6d6b---96982607054.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c67153fe9---85821571678.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5aa4b58fdf---wexataxonamibefuruwun.pdf
    • http://aarogyamedico.com/userfiles/file/nagagefatorike.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/6k6dr9ac9qsgcrr6tjakia6bje/lelawupoxuliw.pdf
    • http://myhomeinparis.com/userfiles/files/lemopuzesefogolel.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/78jdmgqch0jdrsfjoc74muksq8/damoji.pdf
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/phcfrajtgvrec5thf9beqmb42i/zivotuxinolabofalejeko.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/b35caf33f7d16f87f299978e50fe0aff/95874162765.pdf
    • http://atol-res.pl/uploads/file/nupajalelodibe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+build+a+good+rust+base
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113e8.bin
97998d70eb4654b78f6880e43990c076812d534302a52873dd65fe853186d18e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113E8 17760 bytes
font_01_sfnt_off00014272.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14272 16792 bytes
font_02_sfnt_off00015a89.bin
f335fbdd33f29b1dfbeecf06876aa16edce32acf79cd1f4a217d9ca63b6197f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A89 10636 bytes

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