Malicious PDF — malware analysis report

Static analysis result for SHA-256 0845fe0e189461fa…

MALICIOUS

PDF

72.6 KB Created: 2021-09-01 01:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 843c9d79c62fe7666faeaf11d46efafb SHA-1: f6c36c03d5535db0e080c4cd0c806dbd83e62139 SHA-256: 0845fe0e189461fa21f5ef2ba13cbbf99d26eba9aa6329f70d12254e0b7b106d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77620392167.pdf In PDF document text
    • http://ouhkpthaa.org/userfiles/rofarimute.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/de9e25b518b20eeca7c91818318b1e6d/38918994721.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/48377697136.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/0993d7c75e727c1669ab9c82d099d8d9/82735348147.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/8aac825c26607684ae7e52232771d5b1/83036093769.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/24de06db74c55874690eff2f4f535a18/15686814958.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082895f81823---92402089123.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/gjmu0c3ejcm2r9b7m2tk56ej61/koleki.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/genibegexup.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757687ac7c4---fekilovagisuvejozikuga.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/51930996863.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/20624880732.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/20709947061.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/07s5akhh3lvju1mtks4g23urin/40812164157.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/51576991884.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/6884a47b4e09d262db3b53a7fd194eda/99088649190.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c1f7b03e663a72b08704edca7b5d85f5/56295427635.pdfIn PDF document text
    • http://viajesalaos.com/webroot/img/files/zesidabaronovagarigano.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/46129679097.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/gavufafagigidazu.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/0q7u7upgh20kpcnprkc8or33mt/35566433545.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/lojidilinad.pdfIn PDF document text
    • http://linza-market.ru/upload/files/setus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=games+for+android+download+offlinePDF 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_off0000bd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD75 15008 bytes
SHA-256: 94b60487fcf26828b5ca472fc09f8c13c6e1464467d8b0d6c4785d456a4a6f2b
font_01_sfnt_off0000e37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37D 10540 bytes
SHA-256: 892aaf3477a55b113d73e25383944d2f7ad22ac096a9b3969103f3930cd54443
font_02_sfnt_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1