Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebb84c2f4975f05…

MALICIOUS

PDF

84.1 KB Created: 2021-09-20 08:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d5917c83001b7f0e88a9b5d50e0ddbce SHA-1: 73a5a36c56a5fb21dbe06a2272c77d8be6174221 SHA-256: 8ebb84c2f4975f05a5889592682628c9ebf2edb4e3ca1da2df4158428989807b
142 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, with a high ML classifier score and ClamAV detection indicating malicious intent. The presence of a visual download button lure suggests a phishing or social engineering tactic to trick the user into executing a malicious payload. The numerous links, many pointing to unknown domains, are likely part of a link farm or redirection scheme to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://italvaping.com/file/janagudukejatekomalofudez.pdf
    • https://zagorjeadventureteam.hr/files/rekanekogufubexu.pdf
    • https://rpaxis.net/userfiles/file/luxarelenuvepiwiweg.pdf
    • http://sdds.be/userfiles/file/32271830329.pdf
    • https://egyseg.eu/ckfinder/userfiles/files/zitufun.pdf
    • http://pngroup.pl/ckfinder/userfiles/files/14733586782.pdf
    • http://prmakeup.com/Image/files/62243927048.pdf
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/74036784974.pdf
    • https://fontan-montag.ru/img/upload/7274102724.pdf
    • http://studio-castiglioni.com/userfiles/files/degubitasurasikafesanevoj.pdf
    • http://wine-paraphernalia.com/files/winep/_repo/file/45888984566.pdf
    • http://qianxi.cn/filespath/files/20210902112852.pdf
    • http://etpatatietpatata.com/userfiles/files/najodezez.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/887355f3e1cb90e0d1d6ebe4c635689e/molesonurosoka.pdf
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/50784235669.pdf
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/kozojamiwaxa.pdf
    • http://biaikatolikus.hu/files/file/zevalifasovozugafujirene.pdf
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/resev.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/2dc6f0a1b47abd82c8909ba979585228/76537653056.pdf
    • http://yeditepegumruk.com/userfiles/15648036888.pdf
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/74770957514.pdf
    • https://myphambambi.com/webroot/img/files/zonufopol.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=kannada+full+movie+download
    • 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_off0000e65c.bin
5dafa5f0d3518a3bf2e909e530715028e93b0fddad18e74a881e7fbb32240940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 10392 bytes
font_01_sfnt_off0000fdda.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDA 16792 bytes
font_02_sfnt_off000115ec.bin
49d584de9d72a423817f20f775c6f97afb1abd68e1a16e11a6c55ea026a42b3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115EC 17256 bytes

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