Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b70fbd5d4df7e00…

MALICIOUS

PDF

84.2 KB Created: 2021-08-19 17:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 94e27d61b36ebd4da8f81496a5b83b6b SHA-1: d3bb2b15b19854ccc60a52dd337a6e561be170aa SHA-256: 0b70fbd5d4df7e003b236fe61d9fe69966fad4758bca4aa2d11b66f1f7f0b2b7
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to distribute further malicious content or conduct phishing. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dd95a35390---kubopemitofojut.pdf In PDF document text
    • https://unosms.us/userfiles/file/59508044647.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/detil.pdfIn PDF document text
    • http://614move.com/clients/4890/File/jogiv.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/folit.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/91674710543.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/10099191229.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb2943473d---90889221409.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d950126ed7---45983797508.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/1c8bb5eb52b39bb48e48ffefab16ba72/fevovabe.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/wofifonig.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a0f8543f0---62649773438.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/bso1d0nmp8np6ldnhqt79cn9u6/fodowu.pdfIn PDF document text
    • http://kco.su/userfiles/file/fewidoniweledusetir.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/17658140169.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/58216247958.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/13705427956.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608258f2a36ae---92097516175.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45f3f70379---45541329506.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/noxupezinilunabowetu.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090766a72c58---lodewevosimorulug.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/95f986d63359417deb5dd815b6912839/75508629457.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/31f467b60401763f9bd8e3fc474ada3c/xumurus.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7786137026.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=acido+acetico+glacial+hoja+de+datos+de+seguridadPDF link annotation
    • 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_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 16820 bytes
SHA-256: e006a2f11fb560e04da35f4c3286daa6b3912039650cf0e52b03383b7511e360
font_01_sfnt_off000111bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D4 10756 bytes
SHA-256: 4555f6c2287278f6d84fd19ff36b97242460c27d37fed4187eea7a780eced2b1

Open this report in the interactive analyzer, or submit your own file for analysis.