Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce29fe6214577664…

MALICIOUS

PDF

72.2 KB Created: 2021-09-08 17:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea768f6e58330eb0d53c6ad7fb6d23c9 SHA-1: 01ff41a73045935f99305915f3785e1a878683fc SHA-256: ce29fe6214577664468ce0de624d4afbffddae46c43a8d324ebd5a700ac85cc1
146 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains multiple external URIs, including one pointing to a raw IP address, and is described as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://architettobotteonpierpaolostudioabacus.it/userfiles/files/migodefafi.pdf
    • https://ht-cooling-j3t.com/contents/files/disevaxebepotoxoj.pdf
    • https://ketex.com/trcgp/ckfinder/userfiles/files/lalum.pdf
    • https://netshopnepal.com/userfiles/file/60345365954.pdf
    • https://oolong-dining-co.com/webroot/editor-uploads/files/mafejotulozosuveso.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/wupefarisibe.pdf
    • https://anandamsanyal.com/userfiles/file/91827188586.pdf
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/zipamugavopusebiperoxalu.pdf
    • https://gitedu.in/ckfinder/userfiles/files/temunuwafapigixum.pdf
    • http://pc-driver.ru/userfiles/files/kitoxugugi.pdf
    • https://pushtypathshala.com/demo/aims/files/images/files/dumotovanovizoxedoruralu.pdf
    • http://kingsap.com/file_media/file_image/file/73265137525.pdf
    • http://agedwedfjtj.pretty-match.com/upload/files/dufikipekurus.pdf
    • http://140.121.125.49/ckfinder/userfiles/files/20210905_014803.pdf
    • http://nut-shell.net/upload/files/66960563966.pdf
    • https://berettyotv.hu/userfiles/files/70774129332.pdf
    • https://chungangroup.com/uploads/files/202109030614046692.pdf
    • http://smenergy.kr/uploaded/file/1564984726132f40b0b7fc.pdf
    • https://doctmcooper.com/userfiles/files/litanilonidis.pdf
    • http://santeh.md/img/files/66178348641.pdf
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6959978828.pdf
    • https://noventa.cz/media/files/file/gewurexozukerilu.pdf
    • https://ecotranslation.ca/upload/editor/file/lipeted.pdf
    • https://speedwayinfo.hu/uploads/file/12581855575.pdf
    • https://premiersuli.hu/files/files/suziwolomurufijisi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=first+20+amino+acids+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb28.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB28 16792 bytes
font_01_sfnt_off0000d33f.bin
3d022a8159e8e9342d3494c0fe1dcfbdc88d70fc0ca5bdce7b0c6750223ebf69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD33F 10820 bytes
font_02_sfnt_off0000ec33.bin
76b4f3b9cc9690b10b6882234d94cbc24b5f644a30c1ba17baa04bc121380448		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC33 15456 bytes

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