Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0dd51d222d5a4db…

MALICIOUS

PDF

92.6 KB Created: 2021-10-06 18:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a3f935c87cca808e552f3eab55dc2e3f SHA-1: ecf4521cdf81ab508cda6a94ad21071ffba32fd1 SHA-256: a0dd51d222d5a4db4d269169bcb426227b8da608fd0f6c8102d4b8e261951fde
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://tipsclubcr.com/campannas/file/didasogujo.pdf In PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/2edab9788fac0c4dd1938f2c60f6ef31/23240683449.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/wejafujavowi.pdfIn PDF document text
    • https://servauto.fr/img/user/file/seledazumiwilot.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402d4d5ad91---82292567033.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/32866879877.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614024e19a10d---57063719790.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/57871237234.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615290d328b93---25696946412.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/78799814807.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/18861315112.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/88414247513.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-23/20210923234336607442.pdfIn PDF document text
    • http://zamgph.com/uploads/file/020207121045.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/4760117503.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/vopoxaxegutuzubadobazu.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/basusivalevewotafebewizen.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/34687888084.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/suvagiko.pdfIn PDF document text
    • http://voyagerav.com/v15/Upload/file/20219211450332106.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/sokinovabimikasul.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/75156841122.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=my+mother+is+a+narcissistPDF link annotation
    • 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_off00010167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 19664 bytes
SHA-256: 9b66806f566c6e7bd6b135193d3c6b3aab293960cb6173ad7d44dc76570709a2
font_01_sfnt_off00013520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D37 10556 bytes
SHA-256: 1995d7aa6018dc5814429ec061cd5405f6de7d2d679ca1799e6b878fc72e922b