Malicious PDF — malware analysis report

Static analysis result for SHA-256 e848ee3aedd67ca8…

MALICIOUS

PDF

77.6 KB Created: 2021-09-19 17:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b43514d3e4a0dace949e8b73e26cc7f2 SHA-1: 13a22ff7d7dcb8cc70e0d3373c5cf4dc567132fa SHA-256: e848ee3aedd67ca822124ee6365764a913f46079d96c2d08abe516eb3c9c10a8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links pointing to various domains, many of which appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farm characteristics suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://oniceh.ru/uplcv?utm_term=fortnite+mobile+apk+obb PDF link annotation
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/44e79c8cca9d9f72793f3a3a306a9d63/5365048728.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/70812961230.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/migoriremeluruposizar.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/79808402767.pdfIn PDF document text
    • http://islandpointfl.com/userimages/luxitimeno.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/degenejeweroku.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/25443700525.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/xemupisasaf.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/94533320819.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/kenogan.pdfIn PDF document text
    • http://www.polni.si/Images/files/55531516336.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/97105974186.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021091616305816.pdfIn PDF document text
    • https://renewone.de/files/19106413327.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/faluziz.pdfIn PDF document text
    • https://salonrewards.ca/images/file/tusifofedozawazowixuwel.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/sebamare.pdfIn PDF document text
    • http://ranczowdolinie.com/files/67064483266.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/rivozolabedoxeka.pdfIn PDF document text
    • https://fuze-pay.com/ckfinder/userfiles/files/xudemajesisepuvogab.pdfIn PDF document text
    • http://thaide.org/userfiles/file/vanadetamigolanisit.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/gosod.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e291f32be9---gevewuxirate.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/90629245894.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_off0000ceb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB0 16700 bytes
SHA-256: 8cf4ccab6b577b50213f56d0d0a6621bf8a1f8d84382ad73eb9a59726e2fb4d4
font_01_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A9 10452 bytes
SHA-256: 7ace7c14c47f3f3bbbd873cccc802211171b463c3e4735ce7ad87ba58ce7e2b7