Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bb605b0b540d49…

MALICIOUS

PDF

94.9 KB Created: 2021-07-30 06:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 45f9129158efdbf22672baeb109f0283 SHA-1: 78890c84e219b01d13b6c98af4c6538a92e9a50a SHA-256: 96bb605b0b540d499f5dd763ad2974a2094c395bfa3f9e9c6e3c246a69418d99
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Additionally, the document features a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://thefertilizerproductionline.com/d/files/gigejakanox.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c3770d8fb---xavivajagivalimalus.pdf
    • https://bancodevida.com/bancodevida/admin/images/image/file/7621289111.pdf
    • http://granitemountainranch.net/userimages/74511835857.pdf
    • https://candbco.com/ckfinder/userfiles/files/55889048634.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/4d46eda4fe200e3eb150385c0d170f9a/xadoziv.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073b982c4406---lidimovupodewuvikiwuwatat.pdf
    • https://brawlcall.com/ckfinder/userfiles/files/juxokaxosina.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078621deaa4a---pexipibakoxala.pdf
    • http://georgekoldun.com/var/upload/file/zejoxodobijapavesuwakixuj.pdf
    • https://arhstroi.by/uploads/files/xesovulifu.pdf
    • http://arslanemlak.come/file/pipomotumupefisadasive.pdf
    • http://nhasachconggiao.com/luutru/files/19379821377.pdf
    • http://novussiteyonetimi.com/uploads/file/gopuxirelebagiwuvoramas.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160714951389ec---waxakonujolavajefipif.pdf
    • http://lahma.pl/_u/userfiles/file/18029701617.pdf
    • https://reaga.net/js/ckfinder/userfiles/files/betewogofirol.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c862b722af5.pdf
    • https://clinicamanila.com/ckfinder/userfiles/files/56512563114.pdf
    • http://assistance.uz/images/shared/file/nepetemegedutosoz.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3d15c2342---mirajoderufitokakimibojom.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/04954f53d95925f59a242affe584593c/40161932316.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b22a83b209---80882131456.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/50b2c3f5ea9663ee253a7e0d93c4982b/61161401434.pdf
    • http://veterinariogiardinelli.it/userfiles/files/zanexeji.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=wacker+neuson+parts+list
    • 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_off00010cb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB1 16792 bytes
font_01_sfnt_off000124c8.bin
089841507c799f9947191ea4ce9bb9cc82a76a710bfa1e3c32d2845fb4120daf
pdf-font-stream PDF embedded font (sfnt) at offset 0x124C8 10552 bytes
font_02_sfnt_off00013d01.bin
46076da4c72c7bebd104c248190003337d4bab6739f043b8f2d2c9830adb3205
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D01 18588 bytes