Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf674ede2d59f48…

MALICIOUS

PDF

84.9 KB Created: 2021-09-17 22:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a75dbdd4934027e6aee5889edc6debdd SHA-1: 38e095224541c1176ebdbadddb975968884c9709 SHA-256: ebf674ede2d59f486531bb9206b7ca611fb11084446cf13557bacf921afcd562
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly support this assessment. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or perform further malicious actions upon visiting the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crewmak.ru/uplcv?utm_term=does+android+have+a+find+my+phone PDF link annotation
    • http://ilkconstruction.com/Images/Media/files/rameduj.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109080505231495.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613347a4c2dc4---3132390732.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/93656718194.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/9591219088.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/letatexum.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/liwumawifigivugojufokuk.pdfIn PDF document text
    • http://imaginove.eu/data/Files/lugesonunaxuta.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/11565994209.pdfIn PDF document text
    • https://wigs4less.net/nbloom/fckuploads/file/sanukopofele.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/fobitapesuxilokejivivoju.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud/files/petaso.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/41836222258.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/pagodefiwinaj.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/pasotaniwetoxolagokes.pdfIn PDF document text
    • http://bienbao.net/uploads/files/zalofixuwogakewolu.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/2267350820.pdfIn PDF document text
    • https://zahidnawaz.com/UploadedImages/image/volem.pdfIn PDF document text
    • http://sciattella.net/images/file/55623057090.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/jesif.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161303bff78f06---zamatemupamepuxigosabo.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/635251569.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/rawuvevebafatukovuzezasew.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_off0000e8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E7 10800 bytes
SHA-256: 296cd4b71b4cfb7d885294b50529c509c04d745f44377c94640d1a733d1ccef7
font_02_sfnt_off00011997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11997 17084 bytes
SHA-256: 0cdd2821bd7ca504d9f661d560fe158ca539087f9967d5fbd7b5563ea4c27eb6