Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce49fc93aefb251c…

MALICIOUS

PDF

180.6 KB Created: 2021-06-28 06:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e2b9f3a5395e81cdcbd40214bfee54d8 SHA-1: ba60384affc2284f76378f92f4f15d521cf3ae5d SHA-256: ce49fc93aefb251ce403280980217655851a0808e5e396768a7e8c844e64ab37
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded JavaScript further supports the malicious intent, likely to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://applexin.com/ttpsea/files/file/84280731375.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/8809fb450d515300e191e8147fc6813d/65422130238.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/1um766ohihpc4ehurf5sffs8p7/pozumekuwixagomabesig.pdf
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/45920563784.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/uf4g6ek93ahfirrg5m395rlk9m/89773002401.pdf
    • http://lamelove-zakryti.cz/userfiles/file/rusigumagonosad.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/5d6984df101cf18f68a55c28bdc19db2/raduf.pdf
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/33284274959.pdf
    • http://jjinline.org/file_upload/file/jidad.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/87ce649e3a814c99b941414f3081df98/87360845414.pdf
    • https://jotelek.hu/files/file/zikugepokimozodiwutatumu.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ae587eae3---joworobu.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ad6ae943d---wuretesibevopeni.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/t5i9g0uun7i4124o50fb2rqmdk/pebixevukivuzo.pdf
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/pexatuzijitatif.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160932ee9547d2---suverumika.pdf
    • http://japan-railpass.info/images/blog//file/85196453418.pdf
    • https://aquatrustfina.com/userfiles/file/40945664558.pdf
    • https://comobrew.com/newsite/images/user_uploads/file/6342490737.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/fde8b06d8d080b227ffb60dfbe027535/2828780305.pdf
    • http://franzoesischebulldoggen.eu/userfiles/file/22702545890.pdf
    • http://21cedu.com/pds/userfiles/files/lazabopumo.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d66ac153f15---20868665217.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=lie+with+me+philippe+besson+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_off0002654a.bin
37a6ec75dbab9cb24a1b143fcd7173d93e022e0ee0e2853977afc0bd9a1916c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x2654A 18528 bytes
font_01_sfnt_off0002948b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2948B 16792 bytes
font_02_sfnt_off0002aca2.bin
68ca473c47ff1c24eca05c11df495f883b72a811409bc2ad7217c19e2b6cf4c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACA2 10684 bytes