Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4eb25dd8019ab3f…

MALICIOUS

PDF

83.5 KB Created: 2021-09-23 20:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8fa287bf36797e81cc2b0aa2a0d43158 SHA-1: 1dbb9bba4e5329dee47ae65c8665be2da5dd59e1 SHA-256: d4eb25dd8019ab3f5e7bdd1e51c79633f6d19262a86a9fc631682d71360fdff5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Numerous external URLs are embedded, suggesting a redirection mechanism to phishing or malware sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest an attack pattern involving user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cructi.ru/uplcv?utm_term=redmi+9+5g+launch+date+in+india PDF link annotation
    • http://krevue.cz/UserFiles/File/95462706199.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/80602997678.pdfIn PDF document text
    • https://aporpeter.ro/userfiles/file/japefel.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109050804381834.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/83dbacad32c05fd71cc11cbfc66865d7/34382062435.pdfIn PDF document text
    • https://asiapharma.la/files/files/nudefemiwabadupunon.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/18387343543.pdfIn PDF document text
    • http://twilaw.com/files/files/2322755133.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/vunibotufubajumo.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/jozabotufakerenumu.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/87071778710.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/70535964425.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/sovezulelokebitusarilet.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/21614461011.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/darotifuxe.pdfIn PDF document text
    • http://clingac.com/d/files/7519448433.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/46509439050.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/mopoxin.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/fudesutetozideragofu.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/30786195637.pdfIn PDF document text
    • http://prograsifkalip.com/files/12423769182.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/morevunogurobomisa.pdfIn PDF document text
    • http://ags-car.60km.com/upload/files/37040447206.pdfIn PDF document text
    • https://soechi.id/userfiles/file/67688339267.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/niduburaf.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_off0000de3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3B 18972 bytes
SHA-256: b9ee48ff53bb9dfd9945607023a5c5031fb07752aba0f48f48a7d582897ac096
font_01_sfnt_off00010f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12783 10876 bytes
SHA-256: d341963c4ec6c2f4aacec36091183b0547715a29f751531d87b48ee367ca8f33

Open this report in the interactive analyzer, or submit your own file for analysis.