Malicious PDF — malware analysis report

Static analysis result for SHA-256 0989f7b48ae7a452…

MALICIOUS

PDF

73.0 KB Created: 2021-09-16 09:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 99622980e02e7bbc956d59b05df4bb0f SHA-1: 201e10e87f1be3d0b69cc4ab7ae5d36cee95d429 SHA-256: 0989f7b48ae7a452b318f067d1d918ab27fa4024038e4b2bc04e16eb05ab3d58
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting it functions as a link farm. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a large number of links on potentially untrusted domains. The primary attack pattern observed is the redirection to external URLs, likely to facilitate phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://catamma.ru/uplcv?utm_term=why+is+video+star+only+for+iphones PDF link annotation
    • http://uniradioweb.info/userfiles/files/jeleb.pdfIn PDF document text
    • http://czyxchem.com/upload/files/4207555250.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/jiwux.pdfIn PDF document text
    • http://signauction.net/userfiles/file/bepinuxavomuxo.pdfIn PDF document text
    • https://kaparatt.com/images/File/51030195214.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/63188400986.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/50095194611.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/13748553742.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/solegoxojagorori.pdfIn PDF document text
    • https://renewone.de/files/zajaxetibagixefodafogari.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/vumofigabadosedalagimu.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/86545156092.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/79783237094.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/momozikumimoxusugozot.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/85107179373.pdfIn PDF document text
    • https://kstraders.com/userfiles/file/minobubofanedi.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/71856049824.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/bimuzifabisusidomol.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/zusivaxijilomopa.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f13e2327de---72504454645.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/tesivunutesi.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/161397ada3ff82---70127003087.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/xiguluvu.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/14724166247.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210901105200.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_off0000ba20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA20 10768 bytes
SHA-256: fbfece80926214c3d73a307929d076385406822b78584a23585a86762c23ecca
font_01_sfnt_off0000d2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DD 16724 bytes
SHA-256: cd37f912580eb9e51dd09bf0d14f22a46a7957eff5da96b0ab33bae1b15fa063
font_02_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.