Malicious PDF — malware analysis report

Static analysis result for SHA-256 32397f5e088d6e55…

MALICIOUS

PDF

79.8 KB Created: 2021-09-17 00:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e3d8b525f1c77b22a2703ada5468f85b SHA-1: 2247230ebff501815b20fc63d3be8dd86ebc387a SHA-256: 32397f5e088d6e5596c524487193bfdf7ec3fee4f63bdd3ded6568a358fefc8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm for phishing or malware distribution. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the links point towards a phishing or credential harvesting campaign, disguised as a utility download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=pdf+annotator+apk PDF link annotation
    • https://shreenatharcade.com/userfiles/file/33386997418.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/d47a686e63e4f97888430bcb5374cbe5/63265022326.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/22507518710.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/jadofilusapokalirib.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/digaxevededuv.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/66515579262.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/161408ec8c4273---97761933826.pdfIn PDF document text
    • http://china-spec.ru/userfiles/file/nujiwetejezejimiwopevu.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/f0482c528656d4cee196c3a3f5e4cdf4/48622934893.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16137ad0def6d8---33267370478.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/51921305710.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/66735668584.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/wadujipukuxego.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/saxosefopedagukepevav.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/gevetojuz.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/50237030224.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/majemixibawipele.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/xitaj.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1679743542.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132808017b77---joriwediz.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/ladutaze.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/rerijofikupiwuwasiw.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/25900862241.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/kixabed.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/wotaninidevadotet.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_off0000d21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 10148 bytes
SHA-256: fe279896a1f67ed977266a310f3daed7555100851f65770c0db7c47263e53488
font_02_sfnt_off000100f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 18676 bytes
SHA-256: a85368cbf396e9094a0f1b777fb27c274a0a310a57dc748edbec10bb50df9436

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