Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8e618e06f7b321…

MALICIOUS

PDF

79.3 KB Created: 2021-09-11 11:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d010448733fafc908b4aefba80b5a316 SHA-1: 6c967cf656e17eb8377ff2b955f4781a776a9393 SHA-256: 0e8e618e06f7b32143fec5af95a056a132654a1094ba0311ffbd96abf2d068df
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are linked to disposable hosting and utilize UTM parameters, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=2k20+apk+wwe PDF link annotation
    • http://lungshingcentre.com/userfiles/popurosav.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/dijufamigetoridova.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/jarij.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109080903079487.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/63714824781.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a836f8464e04d41bfcf97f1cddb9fc4d/lejinomoni.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/73522015589.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/nerinogibonokumovil.pdfIn PDF document text
    • http://bonekarusa.com/contents/files/nagagefeli.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/gufoniwezivukeruvu.pdfIn PDF document text
    • http://toonesk.com/upload/44524942122.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/jisir.pdfIn PDF document text
    • http://inphilong.com/upload/files/34146685917.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/jojipemavovu.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-11/20210911122940653853.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/dozejakebojopawexitorife.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/47164845120.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16135e3d32f7e1---83541871891.pdfIn PDF document text
    • https://ibextrail.com/editor-images/90698468800.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/70121966565.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/78899784804.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/44534198865.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/12030982385.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_off0000d52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52A 17360 bytes
SHA-256: f4e7a2c10f2f1999b2f7d6ccaea4b4841c49ad244b8c6b3fa1aa93b37149b061
font_01_sfnt_off00010238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10238 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4E 9840 bytes
SHA-256: 4acf7358e5c9abfffb5af6fe4f605402ad6ee277bec00262c8253f63343b0027

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