Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ed3c7f56aab1e6…

MALICIOUS

PDF

80.3 KB Created: 2021-09-06 03:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3a01d6190aa432f7868046a6dda183e5 SHA-1: 4e404b8127296f955fb7d4c1b264f90f8c2ea84b SHA-256: 64ed3c7f56aab1e648ec286209bd58b7c08cf0917fd991a1936a52107545a3d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous external URIs pointing to various websites, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://philabc.ru/uplcv?utm_term=narayaneeyam+tamil+pdf+with+meaning PDF link annotation
    • https://atraba-holding.com/userfiles/file/rusekubilukizizadolafi.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ea06d899ab---bavewejanojava.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/d3aa8a6bbde99187eaa44d25785b26a9/mibomed.pdfIn PDF document text
    • https://keongracun.org/contents/files/refawilujinumeb.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/gutizavuzeri.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/us832sbmnf4o8m3eekvji3e99o/16281898734.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160812c6bd5a7a---fonewusaxejenopijaxor.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/xokarej.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/67094293485.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021062322461073499.pdfIn PDF document text
    • http://js-space.de/userfiles/file/rukaxepubagavos.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/wutofaraxegugiwojatemar.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/volipe.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba19e538e9d---kofas.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/6tljj4mn3mfkouk2r5ok0fdll1/zezoguvenirekeziluburolu.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/dunulekizuteg.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/98630177027.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/nosopen.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/51417489224.pdfIn PDF document text
    • http://origo.ws/userfiles/file/170518736.pdfIn PDF document text
    • https://ienter.bg/files/jugevinilegawulu.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160750da417efc---zakamu.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_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 10836 bytes
SHA-256: 9914c162cc3f1cc37a77a3ac9b3877adc9e189e21594605e1745029eda37fe85
font_01_sfnt_off0000eeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 17476 bytes
SHA-256: a147acd5bdfaa886054699aad3c08fc318d6e6af77fc857b0a5e30cdec6ceb50
font_02_sfnt_off00011b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1