Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee148d79ebe0f529…

MALICIOUS

PDF

74.9 KB Created: 2021-09-18 21:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 24f1dbaf6e44f93a463350986ec6ca93 SHA-1: 0ccd77e5a70b51646e2005ec9487512e8d8f10fd SHA-256: ee148d79ebe0f52930b0eac0b6089fb2f219db24796ebfb7a0b8ee958be712e4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, 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 are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ketchas.ru/uplcv?utm_term=khatrimaza+latest+bollywood PDF link annotation
    • https://migger.dk/userimages/file/vujonevepulet.pdfIn PDF document text
    • http://greenflameenergy.com/userfiles/file/94473378886.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/80562212571.pdfIn PDF document text
    • http://szwygs.com/upload/lexasikapibakolulufabi.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/32968057145.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/68587248486.pdfIn PDF document text
    • http://canvangdientu.com/images/file/xobidenete.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/linixava.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-17/20210917181215266518.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/21571786141.pdfIn PDF document text
    • http://tangiahoang.vn/Images_upload/files/26364834556.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/xitopawuv.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/9424819082.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/najap.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/35686467811.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/71080867895.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/94232784414.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/15750611788.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/74607974008.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/29973165778.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416a97524a4---96189941913.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/jizaradolekosoj.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/rabatawukibijatipu.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/g887cfs3dgmlsq4pok46eakb53/69158356285.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_off0000c1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F6 10800 bytes
SHA-256: b1f31fdba447a53f66e821fede19e5ad9fc8475ecf74e4738168708501bda7eb
font_01_sfnt_off0000daf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 16624 bytes
SHA-256: 76f38df870602c3a4e179818b1dcfdc208b2687b13fdaa8eed9bd997925c6f65