Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a29d4185cec947…

MALICIOUS

PDF

74.3 KB Created: 2021-09-06 19:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3a95c0f43d588f16fd9a1d0f622c2560 SHA-1: aec1481d716db3fccd593bd5ae52084a4e4e2705 SHA-256: e9a29d4185cec9475f79a4cd672d9632c176a67283fb8afeb421d8d4febe30ba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smidgel.ru/uplcv?utm_term=como+gerar+pdf+no+curriculo+lattes PDF link annotation
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/cec51c950b1c2c1d24d8173d5f7a8d02/43379271092.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607919152da54---fefuwujevo.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/kabexuzotanawa.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/wipuwemawizojeniboge.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/lunanuwodek.pdfIn PDF document text
    • https://zhansq.cn/upload/file/bagatuz.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160897d8c48405---zodalajixatabenaka.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/2334538689.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4b7c2ada5---lejakeviwutit.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/25488714239.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/c761e653b04571267b7ff760a5203006/podedebulij.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/53834597002.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/buzenojavugo.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/ribenubosejajupozeromifu.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/3125ad3af6a6ad3e05c78e68045004fe/37369699892.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609499e89b2e6---22526030521.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/fomakosupuse.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/39321025820.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/31639757993.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/sonukegofewapeguje.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/vujagosizis.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/ripabatul.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/gofemofunutotezoriwu.pdfIn PDF document text
    • http://faradbox.pl/files/file/65443877523.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_off0000bd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD588 17236 bytes
SHA-256: dbe10c2cc42e445339e12d9e69bfd4825b2152185e3e05977a43905a54049ef2
font_02_sfnt_off00010211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10211 11092 bytes
SHA-256: 7047ec1b9c8efbb7538fa76f72827dc180a23e4484a672970a78f3fddf1fe2d1