Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad6ef43d672adfd…

MALICIOUS

PDF

68.3 KB Created: 2021-10-03 04:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 01614ee8fac040517083dd69f1f9367b SHA-1: d703a771023f155c6b8e458289104e5bfbc604fb SHA-256: 3ad6ef43d672adfd8b791b241b3543057bea4c258316470a8075aa177bb360fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The presence of numerous distinct hosts and URLs, coupled with the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic, suggests an attempt to redirect users to potentially harmful content. No scripts were extracted, but the PDF structure and embedded URLs point towards a malicious intent to redirect users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://hoilhpnqbthanh.com/upload/file/66765564796.pdf In PDF document text
    • http://thevisionkharj.com/userfiles/files/nonapilalumekog.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/66210566300.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/kasububi.pdfIn PDF document text
    • http://jump360.co/upload/files/20210918122558.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/51275814297.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/4f12eb91b4eced4cd0cb3d32ba511664/nirozapivotesiguminolepus.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/mebunuvof.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/89081259336.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/komugefewulekewawafepa.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/18886426636.pdfIn PDF document text
    • http://lokalsport.no/userfiles/file/97248074245.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/rijonovakisemafi.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210918235842.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/88597073225.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210918_115141.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/nopupimuzegitavisom.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/nafepexijoji.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/sobap.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/71639941913.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/gaparubulebunuduruj.pdfIn PDF document text
    • https://web-dev.ethioapp.com/websites/lightyearsahead/code/userfiles/files/tigirizozofodiboj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=sex+drive+reducedPDF 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_off0000b01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC830 14800 bytes
SHA-256: 2acd5626050f23a3b2b2c8600404d71a7e38005e59244efa2227a85ee8b3a658
font_02_sfnt_off0000ed6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 10008 bytes
SHA-256: 3fd8c4fec287aacbb841b461fa139a997611ec16bab724bdb1d19380ab26af65

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