Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0570d473cbd2cca…

MALICIOUS

PDF

69.5 KB Created: 2021-09-18 17:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c699ae3e9f2a38d2e11e6c9c21a434d1 SHA-1: fbf3eed3f6cca8d2d987feac51f8eb2c7f57e9e7 SHA-256: c0570d473cbd2cca31bd93abd4427d875a8f930139fe6af97d6f52ffab5f21f7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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=hands+on+ethical+hacking+and+network+defense+pdf PDF link annotation
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/zesavuragafeme.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/dinipevafovelapozora.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/46520342153.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8b9bda486---gowemojejurametomav.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/juwokameruxadipabulired.pdfIn PDF document text
    • https://somogyplusz.hu/files/sokajasujerowaseropewiz.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/saviruwefavepijomefotog.pdfIn PDF document text
    • http://quesnelfoundation.ca/userfiles/file/14068424208.pdfIn PDF document text
    • http://ibnuaffan.com/ckfinder/userfiles/files/89615798796.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/97169622773.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/tisuz.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/56514785521.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/xobog.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/japezovobi.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/idja0fkamq60jepiimvsj613i4/dejikupujeju.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16133904881b5d---zomegunusiwufoginoletu.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109160358474231.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/vasezifililozarosanufomej.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/vagagipejalegike.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/11137948965.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/76591520835.pdfIn PDF document text
    • http://vinhthuan.com/upload/files/nanit.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/vezikadazakuzodozover.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/narunalezabidugage.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/90423072032.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_off0000b156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB156 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC968 14868 bytes
SHA-256: 5d0016423578ce8b0a8a0c56290ef5bcd20edc78432aeda710185b53f7e88288
font_02_sfnt_off0000ee9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9C 11068 bytes
SHA-256: 1cc8396f09faa71cd728a2dc46997242c1a13dfa984dad59370374afa340b637

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