Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75ea8c60ecdf240…

MALICIOUS

PDF

70.2 KB Created: 2021-09-17 08:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5c9bf529a4b582cc2ce35dacad08cde2 SHA-1: 2227694bd31c610a11af87f9c65ad6b41f971e4e SHA-256: f75ea8c60ecdf2405f29768b32357a569e0c4cd3ddb71aed0d68fe39bb448a8c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous embedded URLs pointing to potentially malicious or phishing sites. The PDF structure and embedded links suggest a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pecintajp.com/contents/files/gewobax.pdf In PDF document text
    • https://airbays.com/userfiles/file/56936938970.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/72811986314.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16134b044afe72---66073250488.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/wuvusexifumubekow.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/62135750498.pdfIn PDF document text
    • https://bio86.net/userfiles/fichiers/dutofezadegoxofun.pdfIn PDF document text
    • http://tangiahoang.vn/Images_upload/files/bedejemonokebiwulaz.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/torovi.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/nopedasezowiwaxo.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/46518564463.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/43452459282.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/5270250183.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/files/88207100866.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109020706163719.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/5cd51f9c777ad2e38aee5bffdb82d53c.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/cbffd7e0f65fec597c4d1fbe8bef8680/botelo.pdfIn PDF document text
    • http://santeh.md/img/files/42230039142.pdfIn PDF document text
    • http://fullx.net/files/midemas.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/43016922225.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/pufewuretejigepoda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=app+similar+to+oreo+tvPDF 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_off0000b41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41D 15580 bytes
SHA-256: 0a549f47315eaf5c3ca846bb6f95588327d6c97ecf52b04b30086157df3639c9
font_01_sfnt_off0000dc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4C 10356 bytes
SHA-256: afeaaaa8792e019087f63a71dbad0f61bc5ee6af5f2ea06edb4dc859c8c43d04
font_02_sfnt_off0000f3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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