Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c49d7e7430f93ee…

MALICIOUS

PDF

81.0 KB Created: 2021-09-21 07:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ec4b420a8a561718dd46b4f3c01ae12b SHA-1: ad73bb5a0e9b278a4b0d7c21563aa17786c23113 SHA-256: 3c49d7e7430f93ee8928557e726eea348f2cd56a83d8af91d3ee2c69e00fb386
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://oniceh.ru/uplcv?utm_term=8+ball+pool+long+line+hack PDF link annotation
    • http://s13cf5ef.alojamientovirtual.com/ropalaboralbarata.com/userfiles/file/xerizawopofugadu.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed7b657089---xituzipumudefisuw.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/46719117037.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613deda1a71c4---gufosalifutunof.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/lotelabaledagirukox.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/19725839622.pdfIn PDF document text
    • http://szm.hu/userfiles/file/3982790303.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/xulanufisimovun.pdfIn PDF document text
    • http://old.arcnet.org.tw/ckfinder/userfiles/files/falapowupixugexetabesugu.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/15247828278.pdfIn PDF document text
    • http://czyxchem.com/upload/files/79645146532.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/28453888897.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/zikegenonumixax.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/rogimolitadokudafi.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/kifufavax.pdfIn PDF document text
    • http://gptools.net/userfiles/file/lazosilu.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/dijusumazuxala.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/64400652740.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/28983785498.pdfIn PDF document text
    • http://pinedafoundation.org/imageuploads/file/nojebolinuburapi.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/73901627055.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/a16170bd0c382cb07818b1576c104489/lopobebipuxurorugonemom.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/20140400733.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/buvavoloxamugunazi.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355197c008f---xadurafevenepuvap.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_off0000dadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADC 10628 bytes
SHA-256: 1eec2a44e9811e02e55e7ce7772d897e78f4688f4cae45b1b662e8397f892ee3
font_01_sfnt_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 16944 bytes
SHA-256: 17ca8e0764dfd404ddd7273ded765fe4796050a434208bd14896e3f40a967b40
font_02_sfnt_off00011eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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