Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07792d6349a432f…

MALICIOUS

PDF

68.2 KB Created: 2021-09-28 20:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2d445f60ac9aa6a5ac78ad44d5680bac SHA-1: f85d79d040201c2cb121e4c48b7af4fadba05289 SHA-256: e07792d6349a432fb84f5bcd3a6a6d33293e8143ef9a5942b37738ca1a567ed0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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 https://crysiq.ru/uplcv?utm_term=app+lock+2021+download PDF link annotation
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/dipaxolef.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109252010044451.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141121f5825d---bodopuvuvibonujirerugude.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/16234425339.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/tokufogilobisixuwuworejok.pdfIn PDF document text
    • http://1666-3668.com/attach/userfiles/file/lariraretajijuxo.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xarugawevefi.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/zevaso.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/43514064808.pdfIn PDF document text
    • http://moneymaker-gold.de/files/kivasokapaneb.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/69907400626.pdfIn PDF document text
    • http://yibetter.com/data/files/89760077396.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/34919598744.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/41626219333.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/92480645999.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/guwawuruwabig.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/42127805312.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16141733d561e7---rilozez.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/libefukowosufurutoga.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/40566079337.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/repewaloxelado.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/rewetilimibazidegofami.pdfIn PDF document text
    • https://limsurempat.com/contents/files/zonesiful.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_off0000ae35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE35 15056 bytes
SHA-256: 7e1a141263441f6c9b40d22fa817a83a136430c38cad72c4a1d0aae4657007fc
font_01_sfnt_off0000d3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF6 10368 bytes
SHA-256: 6962e4f61334f425719c767046ead46cdd5c7819040803ab4d37d5d064363083

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