Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc252226ee192060…

MALICIOUS

PDF

84.5 KB Created: 2021-09-01 09:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0d2772e282fa9a6af284cbe59f5314f1 SHA-1: 48794b03d3cd9fbc3d543b697a93baa636d4673d SHA-256: fc252226ee192060f997f29ba9198032824a8c5d4c5c22dca06f9494a691de80
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier flagged it with high confidence. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The presence of these links suggests the PDF is intended to lead users to malicious sites for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://joesservicecenternj.com/userfiles/files/75190777032.pdf In PDF document text
    • http://sbnjl.com/userfiles/files/43947132159.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/naniwaxusixafemazoxamol.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/25121923845.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/kuzekusebato.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/xokotudolagulafiwad.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/59957885886.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/wejiseduderovojiba.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c81461531---refokaxeno.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/86702455250.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/nesikobavon.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf1bb1b825---wurojibebuxe.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/63227439379.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/73682076782.pdfIn PDF document text
    • https://motoralbini.it/files/file/15688829912.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/taxunanepivebafar.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/pimegivivib.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/91tmbnr31qgiqh1cabq268eag6/botupo.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed6c52c808---46020865764.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/79614510947.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/45290453690.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/519spreobd7q478k0mvl26jjf4/nivufezawupegepewodif.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083653e81b12---28155965472.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/fj6qgpeodsv8ovu9lj8ao2sb9i/xiropobelagog.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qc10itce6dh2jbmvhq6artrlh2/ximaroruzakukazepafopiso.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/82964302077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=box+office+by+yearPDF 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_off0000e5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFA 18272 bytes
SHA-256: 1ee608bd8c13bca38cbf79f521171356b52966fe5876c410d3a100664791170c
font_02_sfnt_off00012d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D57 10320 bytes
SHA-256: 8f81a83365664129f5bd5a7daa265ee26648133c98f71c7ab6e12280c096aebe

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