Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb110efd84f5b8d…

MALICIOUS

PDF

89.6 KB Created: 2021-07-03 01:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 18448371b39f6129099618f1f0e408d8 SHA-1: 47270d39a197301ed2b72ad480db45465719176d SHA-256: eeb110efd84f5b8de64f90c9bb4512f66dbe271e4396d95e0bc0b781bfe23ae8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, pointing to a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://aranykoronakft.hu/userfiles/file/42808254940.pdf In PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/1itok73on19pphetop2a9ebmsa/mebusaki.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160723851aafe8---lagukojejagagagarijidox.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/gewemidedajoninawifevusi.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/tegizemazatiwetikugejod.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abfe7b09b14---jajubenedibagoja.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/b0c64905f682f3dad7c0c1077459813e/vukovudazafir.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/b13b7a199a7d942ddc246f683a9f51f2/15427030724.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/16027384864.pdfIn PDF document text
    • https://isleo.com/i_photos/file/gofumavu.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/2o6f1e64df2trl0nelmjbu7pl3/28709577760.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/fb2slnsb1pq69f6t2nipfouepv/68205239438.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/a581da25f10952192ae2fc9011d91fe5/36564287231.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/54477747915.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/56c199d9f077f3b53ae7f7b0e3e3a278/vobufoli.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/34ec0d4eec5f76b0d53a43e2fe521cb2/nogexusimuvuzesa.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/71303135891.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/h6a7a4bu9ncd0h6ocolnf08s2r/fobagib.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090454a995bc---20779214046.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/itqbbbellg189qpk8odvvuphh9/xikodaxisokegag.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/34797891346.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98c8849a5---48762833072.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/614fefe33f9617d5d21e14717c5b5486/depogizuw.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/22389755797.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/bffb1276d76715653d40ccc3e4aa2fa5/kogaj.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adf229d5d38---78741402372.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=nursing%27s+social+policy+statementPDF 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_off0000f859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 17280 bytes
SHA-256: 68bd0efe9034e0c765dc54bb549fbb2e47e70b0794c92d0b6a18c887893e8c09
font_01_sfnt_off00012594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12594 10940 bytes
SHA-256: 7d29e0491612d0b8fc00b33383e161b8175393b57fed20b5fddadd07052ac507
font_02_sfnt_off00013f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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