Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd06d120afe8cdd…

MALICIOUS

PDF

72.8 KB Created: 2021-09-26 05:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 351fe984e9301111668e02c78a41c543 SHA-1: 89b4a3d62bef10a0720e778137c8cf8286332ee3 SHA-256: bdd06d120afe8cdde4efe3aa561d5712046adbd1c0e33598872920ec56f63bb9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://infrive.ru/uplcv?utm_term=how+can+i+use+google+voice+on+my+android+phone PDF link annotation
    • https://4cmedica.com/ficheiros_upload/file/wetopupemilobepolexana.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210924_68D3714B988EF8E4.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/kimesuloz.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/uvusuzekakoxagomiwatoku.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/32381226511.pdfIn PDF document text
    • https://12shio2.com/contents/files/12714747860.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/nimib.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/161409e397cfc3---kisajik.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/75703332508.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/mekavegatapoladevagaran.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/60424489628.pdfIn PDF document text
    • http://soupworld.de/upload/file/8240137613.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210919182526.pdfIn PDF document text
    • https://esvigo.com/upload/files/39922624707.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/lomidefotubobu.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/94698343682.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/86952827002.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/ramogevejupos.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/subunopepafakugizunuguta.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/nivimilonenolowut.pdfIn PDF document text
    • http://ty-int.com/files/files/wogutu.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/regaxafumadefokejeza.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_off0000b4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4BA 18176 bytes
SHA-256: 28caaad67259c7717204a8593c554128444ea569412de0001ef34b4be05e0574
font_01_sfnt_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 11220 bytes
SHA-256: 27564289d9054b38c2c21edb49bc3aeb04eb53d7b60c13e52b76d669070dbaa6

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