Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b202c692afad88…

MALICIOUS

PDF

84.1 KB Created: 2021-09-12 23:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 96b04d92af09bf6592897f0f105a2008 SHA-1: e09e6fca45c25682b7fdeedd06ffd9099bd7b19c SHA-256: d1b202c692afad881e7ce519aa39ed449a3a78867344b59ac04e575ab53abac9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to a suspicious domain that appears to be a link farm or phishing lure. The PDF structure and the presence of external URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://synerhu.ru/uplcv?utm_term=compte+google+sur+android PDF link annotation
    • http://www.ruben.pl/ckfinder/userfiles/files/71764674198.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/7123014f17535fc621cca13943e4669c/21734618945.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/44879910155.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/wevuwerekixatufebibogibi.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/25597094505.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/pedisepa.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/ferebefigaxix.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/xakusazusovukaxumofupiwop.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/57947748328.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/54502190805.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/40327330042.pdfIn PDF document text
    • http://biomehl.com/images/content/files/99625288124.pdfIn PDF document text
    • http://novafish.it/userfiles/files/mifopodo.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/lusilitewamifa.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/durumenosapozogiwodumedo.pdfIn PDF document text
    • https://toocapen.com/files/62236857685.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/xatitirubekulewusozaj.pdfIn PDF document text
    • http://stagticket.com/fck_upload/file/titevam.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/46847434236.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/16532811294.pdfIn PDF document text
    • http://timecraftz.com/userfiles/file/72830627494.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16139df03e1e57---35994757839.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/99438528219.pdfIn PDF document text
    • http://youil.org/userData/board/file/fumizukotu.pdfIn PDF document text
    • http://jcpingie.be/public/files/90507282111.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/gareda.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/84155198545.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/46891076724.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_off0000de9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B4 10864 bytes
SHA-256: ae43221cb27d413a2eb5c30af85db66644456526aa3bd795140010b2decff2eb
font_02_sfnt_off00010f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8C 19500 bytes
SHA-256: e68d427aa06b94c13ded5cb820bfba94af7d88a779dcfe528122843f9f3ed136