Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e0cda883beb3e8…

MALICIOUS

PDF

84.0 KB Created: 2021-09-20 02:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 890d1ff2205d8d76155eb949c12390ad SHA-1: 2e048bbb3822755df94e4c1835bb63559be42f41 SHA-256: e4e0cda883beb3e8c0dc9e3cbad859c2fb2af9d808c67de36372cd213b6fe39a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/45565020655.pdf In PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/rulepunaxilakilunefibirup.pdfIn PDF document text
    • http://rld-carbon.com/file/netijaxixizib.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/80885290077.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/lusexipu.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/lazolos.pdfIn PDF document text
    • https://posh.hr/files/95313645793.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16147b3422d277---jidofovizawugov.pdfIn PDF document text
    • http://sns.hu/_user/file/34104535336.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/tagamavapelukezosapesun.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/98649182022.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/74460378880.pdfIn PDF document text
    • https://pecsikult.hu/files/file/61254269467.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/21510835094.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/fifomizomonomajelominazuz.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/30447209443.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/44701943870.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/46180994209.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/borevaferaxugexudid.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/95572299958.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/mamudipev.pdfIn PDF document text
    • http://tjtvina.com/Upload/files/78343992908.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/mitox.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/dewobakututapapomulazimug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=wcc3+mod+apk+unlimited+coinsPDF link annotation
    • 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_off0000e2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000faf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 17784 bytes
SHA-256: 10157fde7de7e66b75f3c134c5e8acf42e10e629d66c9ba405ad1e411a1ed5c8
font_02_sfnt_off0001293e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293E 10932 bytes
SHA-256: 3ebc0660da9c6d12b28e6f1c5154ddca69edde4f95f3ab7236d5e835c8246888