Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f45df8c3a92afb…

MALICIOUS

PDF

90.9 KB Created: 2021-07-03 09:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 92b3a1d95be3f96bfe7ac826d4db90da SHA-1: e602a448595bb623679ab4fe332f7ddb8a7a866e SHA-256: 47f45df8c3a92afbd2f68aaea76515df8d2ff4435cbab8b9cd8c62fdfdcc3f84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating the PDF is used to distribute or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://textosolutionslinguistiques.ca/upload/editor/file/tonejuzewebovi.pdf In PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098bb024a46e---lerofuleridobafogazivok.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/4166015596.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/50812043323.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f23f3a2844---80707502737.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/49d89520b74db30d5cf0a2484e694e8d/tuwijudawexalepab.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/799cac3dd582e16ee126f3e3ab0b5ab6/89071066128.pdfIn PDF document text
    • http://bjjiffy.com/upload/ranuwugopinuvujonekiko.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160926cdb83512---jupuz.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/88470170603.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/5kq2deves18e9siqf8kfsch6da/nurozere.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/eea5ac07fb3a07baec566d73efb270a1/semavozozabilone.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/85913b865d50289af4141f61dd4e7a4e/gujinerozipozolupipoj.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b2882a6b4---85616232724.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/20887958912.pdfIn PDF document text
    • http://kfbi.ru/content/file/87071792850.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebae4a9bd3---kisofozevumi.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160bb83d6d629e---69521683966.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/a8cf3e26e64a886c1002697afbfcff1d/34419838287.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/40681896974.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/f7cf8fc621d562fdf4477b7ed14f800c/65550842011.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=project+planning+and+feasibility+study+pdfPDF 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_off0000ff58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF58 17168 bytes
SHA-256: 80571ee5ce6fb74456965b51338a78e45d4de4c77dcfcaa2be6e091fe6aa2b26
font_01_sfnt_off00012bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14405 11280 bytes
SHA-256: a4f8466d0ae6c5f718d8377953b8dbbd71000194f473d1c5e54c6f59546847d2

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