Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2963cccdbc2e952…

MALICIOUS

PDF

74.2 KB Created: 2021-09-17 12:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 93a9d0b5f20a1699cd2423409672cf56 SHA-1: 8597bd726c094a6a0ce73311f479573fb444ad31 SHA-256: e2963cccdbc2e9521bfb2c360e26f2fa3c930a02342709f50a98539709ee0310
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of many URLs suggests an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://archism.ru/uplcv?utm_term=pokemon+trainer+apk PDF link annotation
    • https://juniorclublivorno.com/sitonews/images_upload/files/80305097079.pdfIn PDF document text
    • https://apra.pl/files/file/45761043906.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/41297246503.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/19230162946.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/40g99th3r2dqq2r64jrfpgtatc/veveveriru.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/22477105230.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/77380650388.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/fowasamubo.pdfIn PDF document text
    • http://ruihuitax.com/files/file/fofowepirubigezurotom.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/33689020733.pdfIn PDF document text
    • http://systempro.kr/userData/board/file/suderufitezofimavide.pdfIn PDF document text
    • https://yourdentist.ro/app/webroot/files/userfiles/files/66548702033.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/07/21214169674.pdfIn PDF document text
    • http://expresskaliski.info/file/voguririmi.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/31073610652.pdfIn PDF document text
    • https://abisspaandboutique.com/nbloom/fckuploads/file/vomamadukolitemebexi.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/mofunilusepuniwir.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/5538883943.pdfIn PDF document text
    • https://charming-dc.com/uploads/files/202109041356124870.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130d5d100ce3---59771593739.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/93929431628.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/14901932752.pdfIn PDF document text
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/linuwimod.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_off0000bebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBE 10292 bytes
SHA-256: 4ba7188a66004d9cd6fb986eb248fd9a08529d02e1bca98f9c5824c1a1a0811a
font_01_sfnt_off0000d5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E2 17384 bytes
SHA-256: 6a23d826b7f3ccf0d40d4291c3f0cdd8f925a7e2d85429a97baac241733fd53b
font_02_sfnt_off00010329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10329 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1