Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fc2c5b7401b6a6…

MALICIOUS

PDF

85.6 KB Created: 2021-09-18 14:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 035b3620f2907815d8e6a82f7ee25108 SHA-1: 14cf97e7abc3cf2c29941e49bfdbaf3630ad38c7 SHA-256: 47fc2c5b7401b6a6b9a7fb03b63177232d661f40741beac07ddafc0c47ea5dd7
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pixomot.ru/uplcv?utm_term=pixel+5+screenshot+shortcut PDF link annotation
    • https://hometeamcorp.com/images/usr/lifodumoteg.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/84944902994.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4cd9a96d5---tirivofiperu.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/mogegu.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631733681_5a6e2dcf24.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/94088405518.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/44854866189.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/50871935675.pdfIn PDF document text
    • http://snft.ro/media/file/27130822839.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/75017162160.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/e31c21efb455ac0e35153ccf43c92a8e/4054452837.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/38287599152.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/beruwem.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/78254801004.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/161396b0085bb9---6318676436.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/xasekenupodij.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/98798089619.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/14201114001.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5c7790f7b---gerusinuvupu.pdfIn PDF document text
    • http://cross-winds.in/upload/contents/images/images/61585429477.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/86186774526.pdfIn PDF document text
    • https://haidangpc.com/contents/files/3757702703.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/78847250506.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/76755411035.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_off0000df99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 10504 bytes
SHA-256: 73a718b65c4d4408150ba7b5d4026ab813cfe81ac704f58d89158a8c30d0c8be
font_01_sfnt_off0000f77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F91 21644 bytes
SHA-256: 20c8504d569a54eeaf1f87f995eca4e8afb6a05b2c0dc0e764e32c1b903c6ecf

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