Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8154fc277a0454…

MALICIOUS

PDF

79.8 KB Created: 2021-09-08 15:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 49317ed066d71c472c08ee0ca11dc099 SHA-1: 1bcc66ff4c9d187174cb32e4b1d23322311e6647 SHA-256: 5e8154fc277a0454f8583138e5ccebe477477181a23bd30803e27bba74495864
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest a phishing or redirection campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://alde-pace.org/ckfinder/userfiles/files/sunijegubixudu.pdf In PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/jizaveri.pdfIn PDF document text
    • http://bonsite.nl/phpcmsys/file/kowukosagibe.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/wevuwerekixatufebibogibi.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/komuwirigojolixesemaf.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/2447889833.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/41477486900.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/vapabevizisobemegu.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/nabiferibiga.pdfIn PDF document text
    • https://mavibusiness.it/file/47227999616.pdfIn PDF document text
    • http://viorina-deko.com/images/file/lifezepisi.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/fikudapirite.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/161387b89180f8---96355376367.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/39198593148.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/26332835528.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/4238693830.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/soboragozisuburubatopin.pdfIn PDF document text
    • http://twilaw.com/files/files/3803555126.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/50601505151.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/jobemenugaxabaxepal.pdfIn PDF document text
    • https://mimpi1pusat.com/contents/files/ledimomutiroxe.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/vomejepigesajofunolidew.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/b70b47a2063835d3e407541b5f87a3c3/lexarebixujakoze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=baby+girl+pdf+patternsPDF 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_off0000d512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD512 10860 bytes
SHA-256: 0eeedde3d6aa85996cf01e2e479320ead49bc6cf81a61b528ea97802a493c218
font_01_sfnt_off0000ede4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F6 16920 bytes
SHA-256: c1d590b46dcae412ee8af909be57f9518b3aa6c2dc0f80b64207157748ed1222

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