Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d7c1cfc73028d3…

MALICIOUS

PDF

85.1 KB Created: 2021-09-18 10:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fa08aba78ac812797df5d9afb12b58c4 SHA-1: e4f699564db5c58ac4661c660008028ee007d778 SHA-256: c4d7c1cfc73028d36565e232bafe92a0cef6404a1f0d0fd997443bc699aa4cdf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Numerous embedded URLs point to external sites, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document's purpose is to host a large number of links on disposable hosting, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://smidgel.ru/uplcv?utm_term=true+skate+all+maps+apk+2020 PDF link annotation
    • https://hotnews.md/upload/userfiles/files/24397726384.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/vozifobabov.pdfIn PDF document text
    • https://meritumptt.pl/dokumenty/file/80975737239.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/xixuwamelowinifopapulemor.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/tofeped.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/kitapamoxaxasudul.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/nujemopenoduvefewanoduluw.pdfIn PDF document text
    • http://hanyangsteel.com/files/fckeditor/file/183140222361317f05b3601.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/56938134925.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/61117666756.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/puzusolipi.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/71168548850.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161416bf1d9fe6---lugurajuro.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/kevurawa.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/nekamovetodisu.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/13694297427.pdfIn PDF document text
    • https://premiersuli.hu/files/files/48800114341.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/63090325145.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/xevudorowajediti.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/38914957737.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/bafasifomabepojerokak.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39314885944.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/sawebipudokumedowube.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_off0000e6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B9 10492 bytes
SHA-256: df0f25aa10f09b168dafe3dd9f225f5779f30080bb4a1b2984aad39947c5931b
font_01_sfnt_off0000febf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBF 18248 bytes
SHA-256: a4a5c7fb20b9747fb3d09dcc14edc791169e267a58f5c48af38492dc29844867
font_02_sfnt_off00012ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.