Malicious PDF — malware analysis report

Static analysis result for SHA-256 232d0b39bee22007…

MALICIOUS

PDF

101.9 KB Created: 2021-08-20 12:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 04592330e7be4b1f782eec644063cc6b SHA-1: 808f982cbc67a7d1b015f4a35facae52a70a52fa SHA-256: 232d0b39bee22007b6e784f661ecdbcb2072ebf433360f9973dfdc25ac756516
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://cructi.ru/uplcv?utm_term=what+was+the+purpose+of+the+temple+in+jerusalem PDF link annotation
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b61deeefef---xarudojepisatejazofezibin.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a56254f1ae---36308209862.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/0d5b0d5e395878644ff4373f563dab99/fudijuviwosezipewevuj.pdfIn PDF document text
    • https://cooperspick.com/files/murok.pdfIn PDF document text
    • https://www.thaiahpa.com/flash/files/jeruxeniz.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112e675b795c---zufewumedid.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b64a1a2749---xawadopovexeko.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c1362ff2b77---repojovotu.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/gopafidowimarubigepi.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210804153715.pdfIn PDF document text
    • http://ideas4mypool.com/userfiles/file/63626772899.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/zisuzuponevure.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/86437798042.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072705522c55---perigurab.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/fda68f16000afe7223e8a4191b18d415/faraxejubi.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/8ee044feb6593a9b10bbdcff08ef677b/68490320743.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/11266287041.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/mimotelafila.pdfIn PDF document text
    • http://altinay-law.com/images/file/luvenuvegegobevizumujom.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6116c0552---tapuxerosaremutopawofo.pdfIn PDF document text
    • http://0930actress.com/files/files/95418017938.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///3167693695.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/bivujikonulon.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/qu0qcbs9haa7jfsdpfoh18hj63/67224127183.pdfIn PDF document text
    • 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_off00012aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA8 18224 bytes
SHA-256: 1f1456ccead9d95ccaff675c36e72789139e6230fdb37fc908aeab107b16e644
font_01_sfnt_off00015844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15844 10932 bytes
SHA-256: 150c5b5ba8fc4a72af01c9201dfa4d4cc021e03d12d5b38255337d8517364f57
font_02_sfnt_off00017162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17162 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1