Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e71aac26f1f7444…

MALICIOUS

PDF

104.0 KB Created: 2021-07-14 03:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1e8b9663f9e2308d3f6affd1e064c1a SHA-1: 8c5592e1036eb48396b60bf3f58a5e24610d27cb SHA-256: 7e71aac26f1f7444df2e3d094870f5a90a7bb0b49a1f5cbbb294f5f9f8dd180d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised CMS upload directories, suggesting it's part of a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 6

  • 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.
  • 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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d5778877f---21390712989.pdf
    • http://healhumanity.foundation/userfiles/file/81915463568.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097f81e85347---92797402973.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/g69bncv9j67go0hnbabdqnq570/dunorixeviwudur.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af52ff821ae---wabofibopufubuvaluzij.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3729d8d421---44603663701.pdf
    • https://asi-filter.pl/files/file/damipimel.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2418a4d229341cd830855d04a6f30918/razepuridikepo.pdf
    • https://avela.md/userfiles/file/lokigav.pdf
    • https://miruyuta96.ru/admin/ckfinder/userfiles/files/donogagorubobeteleva.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16099a57948eb1---12863430680.pdf
    • http://beijingxinzhi.com/userfiles/file/20210703094251_933102968.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afff5f60eb4---larurufudeki.pdf
    • https://momsgardenfoods.com/ckfinder/userfiles/files/76474562800.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/da2bbf0166751ee007c0bd0d0e15331b/fozesofitesukuxetusede.pdf
    • http://omgmediatank.com/userfiles/files/dugefawezonubiporar.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/8d2e1185c3f83883daedc9299ddf98f2/95474881149.pdf
    • http://glina-master.ru/admin/ckfinder/userfiles/files/87463715262.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c614973d578---befafabusijipupuwijokan.pdf
    • https://machinex-machines.com/UserFiles/File/43993220239.pdf
    • http://barrybusiness-crm.com/ressource/devis-photo/files/31733225271.pdf
    • https://aprilboya.com/userfiles/file/35438962814.pdf
    • http://permanentnimakeup-brno.cz/userfiles/files/71542770555.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3a72a0f39f278d7a537d875aa7b9480c/vutodupexutavuri.pdf
    • https://deesudcoolingtower.com/userfiles/file/suxojepugibenago.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=young+schema+questionnaire+online+free
    • http://s292376414.onlinehome.fr/datas/imgmail/file/siliju.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_off00012f52.bin
c7bfadf5b4c32ce726a6ef4c2351ee36a53f64307ae742c8cc665a66632712bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F52 19436 bytes
font_01_sfnt_off0001614f.bin
f3838e68d6ec418d4afb9ea22977d0582d76beca13b1ac5f261112fc0ce693a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1614F 11012 bytes
font_02_sfnt_off00017a75.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17A75 16792 bytes