Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f8168c74cb9718f…

MALICIOUS

PDF

84.7 KB Created: 2021-09-15 17:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 406a9ba35edbed348aa61c558e364d5e SHA-1: 323b45c182aaf9884f72284b4680f70f81bf1544 SHA-256: 1f8168c74cb9718fb7b56319c9a59944d73b2fa84083420ae15f7ea7a0dd7c9f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chcial.ru/uplcv?utm_term=app+fax+gratis+per+android PDF link annotation
    • http://neodentpetrosino.it/userfiles/files/42059816009.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a7a886ddd---tifupudelow.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/97151192956.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76516442006.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/70632035102.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/97417495078.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/20008445005.pdfIn PDF document text
    • http://hkacca.com/userfiles/vonelinem.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/5907482263.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/3887546959.pdfIn PDF document text
    • http://e5tbr.alruaa.com/ckeditor-ckfinder-integration/uploads/files/90057012883.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/11954488407.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/20f61351dadfc9ef2fc4d0cbf2057671/56647719131.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/vabupugam.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-5/20210905025955490931.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/92801570461.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/613281500.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/37336553749.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/teralawapasuvajovofumoj.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/zijomogagefamumekodigij.pdfIn PDF document text
    • http://vidiniaibreketai.lt/userfiles/file/vigitefupesarazoxeno.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/nonudagananidawifepo.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/vuxiwokivad.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_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 10712 bytes
SHA-256: 0203b36150d9d7d8628aec7b073ed5b01b30d0ae4a18de1f0dd665b1e34eb618
font_01_sfnt_off0000ffa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B7 17476 bytes
SHA-256: f7584e411afcc69a84f8f60b4a21b47373710ffaa3f662d74b6d687807041eeb

Open this report in the interactive analyzer, or submit your own file for analysis.