Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbe1180a07cd451…

MALICIOUS

PDF

82.0 KB Created: 2021-09-08 19:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0a9538838774a44686dc9c2b35345a96 SHA-1: e0ff9898f33c6eb7aba58d27233a933240a27a6d SHA-256: 5bbe1180a07cd45158e2b575478959dea11acb47e9dbd99e2eb327b7736720b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many with 'utm_term' parameters suggesting tracking or redirection, indicates a likely phishing or link-farming attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=converter+tiff+to+pdf+online+free PDF link annotation
    • https://signos.larrialdiak.es/files/galeria/files/nuxuvetozupadoxolimovitox.pdfIn PDF document text
    • http://weingut-suppan.at/files/bogovisulezikoberenivivat.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/69174731720.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/nefig.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/bisefot.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/60918849679.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/71875113931.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/94561984457.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/75677444921.pdfIn PDF document text
    • http://profstil.az/userfiles/file/podiloxinaxubomebexi.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161373fddb7ecb---45923916701.pdfIn PDF document text
    • http://apothepharma.com/upload/files/47662335292.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/mazajewarovivasaw.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/nefujifokeb.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/350318675.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/11364595460.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/af8516b1f5a8e2cf2b54f3d32bce2dcb/36627135532.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/43807635370.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/dodipesorasujojesu.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/25291301044.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/76021648645.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/turozotofeziwuxuk.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/zufuda.pdfIn PDF document text
    • https://kaskad-74.ru/images/uploads/46108162257.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/58770110040.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_off0000dc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5F 10260 bytes
SHA-256: 1fcfa8539e4a3287bbc970825d776a95cb994b12d6bd3decd52aa3ccf2fbbd7a
font_01_sfnt_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 17992 bytes
SHA-256: 87bf402b23a96dbcdbf7597b91ca0c9936d10742e20710a9aa930366c62d391d
font_02_sfnt_off00012214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12214 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1