Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e4af6cc2ee4bca…

MALICIOUS

PDF

82.8 KB Created: 2021-09-16 15:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0ad1afa5c2da2c254fd44019cdf24529 SHA-1: e5208da0c3a7c4094b16e27005ef3b5b16b49723 SHA-256: 04e4af6cc2ee4bcaa8c8f8555741011ab1618497d35feb395831ff6417330649
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by an ML classifier. It contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on potentially compromised or disposable domains. The primary purpose appears to be redirecting users through these links, likely to a phishing page or a site distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crewmak.ru/uplcv?utm_term=online+games+to+play+with+friends+phone PDF link annotation
    • https://hiperaktivite.info/userfiles/files/momagafavabufopotafovazav.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b5e75888f---28531661306.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/27608295308.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/20282439820.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/23210814335.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/menerumewepizezukiza.pdfIn PDF document text
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/5104665300.pdfIn PDF document text
    • http://neapol-m.ru/usr/file/24068977513.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/9730963756.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/62545987096.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210915224747.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb25713dcf---mofusad.pdfIn PDF document text
    • http://mfcpavpos.ru/file/57943365242.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/dd28e2a289479226b7c3aa4f545a09b3/regajufina.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/jalusesolurodalusatovewa.pdfIn PDF document text
    • https://manenshop.com/upload/files/panuzugefi.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/49897667861.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/tusidamokiwagabu.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/40ecb9052a84c30081254fe9e07422f4/tunodosuvalesidu.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/gavinoda.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/17506028860.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/wowejuzolitanilinutur.pdfIn PDF document text
    • https://tivirtual.com/userfiles/file/wifilidijataxowasibuwemuz.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/85927562866.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/pelidusutekam.pdfIn PDF document text
    • http://marklaliberte.com/fckupload/file/4077640376.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_off0000dc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF444 11172 bytes
SHA-256: 96dfc665e5a0b1856511a10b8a3e385e44c402e301313a012cadb64fb0879cf1
font_02_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 18328 bytes
SHA-256: 2d150e3ee01123c774596e45978a423fc65ee3c5d642b1e03871f659d6d766f3

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