Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fcec99a28198324…

MALICIOUS

PDF

85.9 KB Created: 2021-06-01 21:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 45f375b606c60449b14a8467264bd915 SHA-1: 2c34823efa7364329c773e801e69e9a86305711b SHA-256: 4fcec99a281983240e93368a295d0375376eab48475f3e8f2133c102ddea6665
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, with one prominent URL being `https://leonvi.ru/123?utm_term=attestation+d%2527+h%25C3%25A9bergement+prefecture+de+mayotte+pdf`. This URL, combined with the document's metadata suggesting it's an 'Attestation d' h ébergement', indicates a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/123?utm_term=attestation+d%2527+h%25C3%25A9bergement+prefecture+de+mayotte+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367312/normal_6039c9b72baa3.pdfIn PDF document text
    • https://xunatopek.weebly.com/uploads/1/3/2/7/132710497/9076552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476782/normal_601b970a5adc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60253843e1791.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5ff262acac01b.pdfIn PDF document text
    • https://numokafi.weebly.com/uploads/1/3/2/6/132695525/8177647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424696/normal_5ffc82529154c.pdfIn PDF document text
    • https://zepemotofilizag.weebly.com/uploads/1/3/5/3/135399015/7c7eaecb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zegugas.pbworks.com/f/what_type_of_oil_does_a_toro_lawn_mower_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23adffb6-df21-4d78-994c-bd43ed8347e7/83564566674.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144424044/english_file_upper_intermediate_students_book.pdfIn PDF document text
    • http://zezimin.pbworks.com/f/gw2_raptor_mount_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc64901-e264-4279-9a6f-d60791d6bb5b/the_wahls_protocol_audiobook.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/w/file/fetch/144434817/wavuselenexuxetaxi.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/f/54520815256.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/el_libro_del_diablo_pelicula.pdfIn PDF document text
    • http://fevosezew.pbworks.com/f/24667250159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea068efd-f043-4c10-8552-092d78896f3c/lactancia_materna_exclusiva_minsa.pdfIn PDF document text
    • http://zajozote.pbworks.com/w/file/fetch/144474858/mukixuvakidel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0e275d-0f0b-4e16-ae38-cf3a28fb7936/life_plural_lifes_or_lives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bec18fb-ae0e-45af-818a-4fe55075b053/vumudemewufawepusuveveze.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144412134/99793606974.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/f/tales_of_the_yawning_portal_maps.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/84722454012.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F5 5944 bytes
SHA-256: e915a9d76436c138f486ea02d7ede18ef265ec0fd344acca29f9dea8c5aaf676
font_01_sfnt_off00011dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD5 13264 bytes
SHA-256: ec4af7781fbcc3de8e2abb003b248176869bdcc64da4a89fa8ed89cb94b6e1ac