Malicious PDF — malware analysis report

Static analysis result for SHA-256 5905849ccec3da7f…

MALICIOUS

PDF

69.5 KB Created: 2021-09-09 08:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 38dd241ebb3e1a97553c1ce71a07703b SHA-1: 4aeaa37d7c2ef8d57d37a6da8137ae89764b8c85 SHA-256: 5905849ccec3da7f61b5f943387b6396f749fb66722090d57805b8a75d2f182b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. It contains numerous embedded URLs that point to a link farm, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content indicate it is designed to redirect users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ubestsports.com/imager/files/20210909124532.pdf In PDF document text
    • https://sukhayurveda.in/userfiles/file/varorukawolarejo.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/vokefenu.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/purolamuf.pdfIn PDF document text
    • http://haai.org/upload/file/37999567045.pdfIn PDF document text
    • https://typeone.com.my/ckfinder/userfiles/files/jupifekowi.pdfIn PDF document text
    • http://ifap.it/images/file/99759882760.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/2815871795.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/27oldjknqgimg31tuuf4m7uvg7/pobizuwit.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/51112085873.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/jivemaz.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/84807859286.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139217abb431---81564899914.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/xewewobokiwipofiled.pdfIn PDF document text
    • https://schmitz.cz/res/file/73225010719.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/fibonuvukazojanevaxid.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/14368947985.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/wijukos.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/82960947728.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/vukab.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/36520057078.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/35797831310.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/bigegobipewaz.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/96395512113.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=kaka+ji+full+moviePDF 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_off0000b014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB014 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82B 10284 bytes
SHA-256: 2ad9251801dc053007a64d185dc9325256a3af9f1df7b979814a60769c80b77d
font_02_sfnt_off0000df48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF48 15692 bytes
SHA-256: 301002c49b37b31fd7129f4313aae4c3e10dc2ad338f0d2127b6d4201668eee0

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