Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db8005ff730ccce…

MALICIOUS

PDF

87.5 KB Created: 2021-09-17 00:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ade522596e5a80c70045d80c55db7248 SHA-1: 6d3e80ff23a34f9575b185272a6dfa2b32b3bddd SHA-256: 9db8005ff730cccefbd70ee7746a7169e80a24f6ad94f4a7e25b6ccb19cf4c2f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs and link farm structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://catamma.ru/uplcv?utm_term=seeing+jesus+in+the+old+testament+pdf PDF link annotation
    • http://beerskiboot.com/img/upload/file/33783333197.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210915223842.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b19fc0d60---58264432636.pdfIn PDF document text
    • https://uangraja.com/contents/files/92682000440.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/92042184254.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/72248430013.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/lfegqncdu4pkq7kp599n8kbpgc/sanudekenuzozinep.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/59948348503.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/96698212783.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409e864b71a---49372426312.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/sevoje.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/37241190542.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/66reej449iqvta2e5g8p22890a/fojitexiv.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/53305176855.pdfIn PDF document text
    • http://hanaelectric.com/userData/board/file/27828098537.pdfIn PDF document text
    • http://erimti.com/userfiles/file/60284767782.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/zijasidoziwekonumu.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139061a8dd48---vixew.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/buzuna.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/sozitote.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614045dc22c38---ninokinejifom.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/watuduvumotobene.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/52074516768.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/sovonesawunugado.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/30013229554.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_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 18424 bytes
SHA-256: 208a7dae0a8533e1c082ad2885f233b39994137b3471576eaa6197f4f76c8963
font_01_sfnt_off00011e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E84 11148 bytes
SHA-256: 7b5c024d718beda3f79fdecc4a74644deb7baba313cea1dc608fb7501cf0462b
font_02_sfnt_off0001381f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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