Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9430025e4484b52…

MALICIOUS

PDF

96.9 KB Created: 2021-09-16 15:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 11c6555605215c8e9a6f68cf183cb8b8 SHA-1: 555c43edfa4260bbdb2051279d20f8dc3e990078 SHA-256: d9430025e4484b5239ddd021a6953c90650d5bc0b7fb52b06bbc4d8528661522
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports this, aiming to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://egokituz.eus/files/galeria/files/47590547476.pdf In PDF document text
    • http://cssh.es/img/file/waburon.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/51144907021.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/segikid.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/ranokitijigurot.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/71711488048.pdfIn PDF document text
    • https://akconta.com/uploads/files/dinofokajuvepudatupevuxa.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/36949287331.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/kegotodom.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/bofabajidagiladubilagut.pdfIn PDF document text
    • https://betsin.org/userfiles/files/kafanekixisota.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/15f064b36aa6d6855b7f11ff57b5723d/bemugere.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/mogusedesexuxozubowuxisib.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/kiwagojerodibifefogegul.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e40a3cab4---4388464754.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161381dabf2246---36048603552.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/zasup.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/loloviroluxesurerojexezep.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210909_035321.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/95488946923.pdfIn PDF document text
    • http://bjqyms.com/filespath/files/20210906030954.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/gizadogafepurovuzugivoxed.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/24961479874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=sufna+full+movie+downloadPDF 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_off000118a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000130b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B8 17492 bytes
SHA-256: 5c244e0136189bd67a44df09ce555a86bbefe6633f19c9bd10148e0ef5daeada
font_02_sfnt_off00015e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E36 10476 bytes
SHA-256: 365d0f5557438840f6ad0c213c039c93adf8f1a565195e20877a59e176b402b6

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