Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3c0469bf1e2bec…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 07:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9aba1c7aae942dd69f2281416a817016 SHA-1: 5ed491680080782979104bad65cf80cb0e16173d SHA-256: 3e3c0469bf1e2beca6f3ed6b52bc8e391183ede8c640deb21aeef3ebfa4f170e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, with one specifically using a UTM term suggesting a lure for online content. The PDF's structure and the presence of many links on disposable hosting further support a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://oniceh.ru/uplcv?utm_term=late+late+show+season+5+episode+50+watch+online+free
    • https://pingthye.com/userfiles/files/kufidid.pdf
    • http://mwbright.com/upload_fck/file/2021-9-17/20210917134724215408.pdf
    • https://g-stampo.com/pics/pages/file/23168943622.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8a48a40d7---54187452441.pdf
    • http://heydarbaba.org/resimler/files/86994436284.pdf
    • http://www.depomatrial.com/file/2990391356.pdf
    • http://hanstime.com/userData/board/file/xurukosotapuba.pdf
    • https://lexconsulting.ro/webroot/files/media/1935148078.pdf
    • http://only-svet.ru/upload/files/58975440003.pdf
    • http://dxqzx.com/ckfinder/userfiles/files/20210913_000504.pdf
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/lirufufosoxexeweretov.pdf
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210913035346.pdf
    • http://megalabsrl.it/userfiles/files/1186204797.pdf
    • https://restaurant-kamkok.fr/img/Data/file/buwidifosevatiwoz.pdf
    • http://mrybalko.ru/files/tapifotowudixafof.pdf
    • http://linuxnewyork.com/draft/media/46035348474.pdf
    • http://wang023spa.com/userfiles/202109file/2021090508531770554.pdf
    • http://prodottoitalia.eu/userfiles/files/muxaselasijamo.pdf
    • https://kligi.viart.lt/ckfinder/userfiles/files/44490541170.pdf
    • http://artiguardia.pl/userfiles/file/94412142461.pdf
    • https://cuichi177.com/uploads/files/202109130207101050.pdf
    • https://trongtrucsolution.com/uploads/files/benijefifebogatetevorer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc49.bin
781d1bfa0ebc7ffc5da5d538b3a5962f399648b933bf9eac94c4f8fa210e5b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC49 16852 bytes
font_01_sfnt_off00010807.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 16792 bytes
font_02_sfnt_off0001201e.bin
06d260014ea3b57474daec3033517b83673446bbaea80115f33401a9ffc0600e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1201E 11016 bytes

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