Malicious PDF — malware analysis report

Static analysis result for SHA-256 3952ac39be1443bc…

MALICIOUS

PDF

68.3 KB Created: 2021-09-20 05:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 873565c89653fce1db2d30d719ef2f14 SHA-1: a13df526fb28a44611cb8a81f069cf54bcd70f23 SHA-256: 3952ac39be1443bce86c73cfae6e36ad56582112deb171d0096a3d8e47a0c072
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://chcial.ru/uplcv?utm_term=emoji+di+android PDF link annotation
    • http://khangvietdn.com/uploads/file/30159768095.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/wozekibovigesi.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/96856037182.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/nixexuxaloxo.pdfIn PDF document text
    • https://izr.fr/files/tomidejifesimidive.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/13608933554.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/56130242604.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/92336142270.pdfIn PDF document text
    • https://nexapos.com/upload/files/jufixasufufatosefidem.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/12482261084.pdfIn PDF document text
    • http://www.heksan.com.pl/file/20234669818.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/gisofejavuf.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/22657902468.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/wekakapel.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/73646183383.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/kebuvomejamoxudulunol.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/82021620911.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/65354703968.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/32036236373.pdfIn PDF document text
    • http://topstec.com/d/files/zimexuziri.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/kezaroturapalogidenarip.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_off0000b1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BC 10076 bytes
SHA-256: 9e5b335ecfaca9bd79953d9b37ba9d87f0732b0742da395357dc3190a7714c96
font_02_sfnt_off0000dff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF4 14576 bytes
SHA-256: ceaa8465797dfaa3459b279121726a8ee0b3d911e5ad7671092cb3ac0aa11366