Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd10deaead72406…

MALICIOUS

PDF

80.4 KB Created: 2021-09-20 06:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f893838672f60881c379e6eb2a874615 SHA-1: b7d6d148d68b4f9c4e6b74050233be7cdc1b98c2 SHA-256: 4cd10deaead7240696afb66554532328ad8030c7208afcee217573bc67d47fe9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains, indicating a link farm for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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 http://milkyway-vn.com/upload/files/36944363438.pdf In PDF document text
    • http://iwayman.com/uploadfiles/file/210914021724742781tuja1k.pdfIn PDF document text
    • http://wohntraumgmbh.at/gabutanalo.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/1125835147.pdfIn PDF document text
    • https://yenicekentkaplicasi.com/userfiles/file/25838140435.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/18448789500.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/jurupizaniterowujakabez.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/fowalupofamegafup.pdfIn PDF document text
    • https://movingalpsfoundation.ch/userfiles/file/runusirirudutiresetazeku.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/55998660540.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210906050152925.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/13788444810.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7e7d1be3a40f1af97ade1f500603b7ea/17223829412.pdfIn PDF document text
    • http://akademibt.com/resimler/files/49746090423.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/nokebapak.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/tumib.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ufq9qjii96d7k3nb6orbpj9912/70646094032.pdfIn PDF document text
    • http://dayou.tw/uploadpic/files/202109101654103754.pdfIn PDF document text
    • http://www.llmhospital.com/www/js/ckfinder/userfiles/files/31680927148.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/zewafuxatedajegajanip.pdfIn PDF document text
    • http://finchamauto.com/pics/loneruliw.pdfIn PDF document text
    • http://xaydunganphubacninh.com/webroot/img/files/120332965.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/wuninesomidulimelidapek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=recovery+android+com+safePDF 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_off0000d2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 18600 bytes
SHA-256: 4f2fbe529cc88d92c017b87f5bb724856d23ff57be8f55dfbbb52023dd15ead5
font_01_sfnt_off00010364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10364 10720 bytes
SHA-256: e79b14f51616d6552a6fd151264b577932323e772bbd66f9d9964f26b1fc884a
font_02_sfnt_off00011c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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