Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0ce72e547a2dae…

MALICIOUS

PDF

81.2 KB Created: 2021-09-16 01:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 72b8a76d71cec821b26ea32ca23e4389 SHA-1: 8343e2c0e3b864ac54dbfc730e5a1220167ede4c SHA-256: 3f0ce72e547a2dae55a162891b46014b56f5a52895c977458314d290d8097ac0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=pubg+mobile+lag+fix+2gb+ram+apk PDF link annotation
    • http://sangtaoad.com/uploads/userfiles/file/zurokepovexivinexo.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/tiginopufoxiwiriluzonuraf.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/lagotuf.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614278eb2681a---dekirukexuribi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8b9a693411fcca1c8a562549276ea29b/pozikifadorale.pdfIn PDF document text
    • http://pneusmarene.it/images/file/31888535519.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/59688564426.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/97591441150.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/danuvivimugobatonamu.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/rosag.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/dunubebefozufiweku.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/fumunubu.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/mepepaxonotogi.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/27303227394.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/85459280982.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/82753766715.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/9719958732.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/ritaxuberuforero.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/78700972353.pdfIn PDF document text
    • http://signauction.net/userfiles/file/98784826071.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/pufetogimo.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/90289537956.pdfIn PDF document text
    • https://ms01bet.com/contents/files/wikumelik.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_off0000d814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD814 17512 bytes
SHA-256: 2ad2cec012b096a1cbed26b08192499a46e6b596b4e5208c74540abaac84ea1a
font_01_sfnt_off000105c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDD 10888 bytes
SHA-256: 285bb1096931d452dd8d34e1224a0c6722f0f0ee3e8363ec9cd59e2f549f1e60

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