Malicious PDF — malware analysis report

Static analysis result for SHA-256 8092de18ae128d47…

MALICIOUS

PDF

68.3 KB Created: 2021-10-02 14:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2c2abae906d8b3f577c7f56a93455e70 SHA-1: 9f892e06183240b42e3745d8d03a8483751e6e60 SHA-256: 8092de18ae128d47b14ac16bb49bc06bb08507f9caee8f2edc411404c63ccb57
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous embedded URLs suggest the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted, but the structure and embedded links point towards a common phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb9c1862e5---kesixemudofi.pdf In PDF document text
    • https://aspit.ro/imagini_ws/pijotul.pdfIn PDF document text
    • https://predial-rua-nova.pt/056-CovadaLua/images-editor/file/jirozeperovuzopusib.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/41578765089.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/88996879641.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/71908263308.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/38965030074.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/razezanom.pdfIn PDF document text
    • http://ore-processing.ru/d/files/25563601181.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/bejedufowevalanaforev.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614047055af4f---tuwafufutilif.pdfIn PDF document text
    • http://bangkok.union.travel/ckfinder/userfiles/files/mogosomofejatelimako.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/83465397841.pdfIn PDF document text
    • https://htchninc.com/d/files/57592619154.pdfIn PDF document text
    • http://sin-hua.org/userfiles/somuno.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/tidetovomoditibanokav.pdfIn PDF document text
    • http://air-ned.com/uploads/files/sarasifuvazekejajexafi.pdfIn PDF document text
    • http://wwstationery.com/files/file/jipuvumoposajipu.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021921959133751.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/vurubamulog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=4+types+of+leavening+agentsPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/zomuxisobaxu.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_off0000ae0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0C 14672 bytes
SHA-256: d1eda9ec5aa10f9e7052bdfe8d3cbde30c261f55d02e736f9f20d79cec3da898
font_01_sfnt_off0000d2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E3 10596 bytes
SHA-256: e4e8e93fef207efb025bd00ee84f691c707501ee7def6f461bb02312526d0650
font_02_sfnt_off0000eb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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