Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8bd5e2f4ea757d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-30 04:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adaf0bf3d556471f7aa9bf28ac091c74 SHA-1: 1d7b1eaa94947820fe9fc3d289324776ca2f1d5b SHA-256: 3f8bd5e2f4ea757d74c94c1abc6d7a15d927718af7afeb50d335ca655e9b6bb6
104 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and a document body that attempts to trick the user into downloading a file, masquerading as a game mod. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/wix?keyword=nba+2k18+mod+apk+latest+version
    • https://cdn-cms.f-static.net/uploads/4488817/normal_603ff35d6aa90.pdf
    • http://vafijevimam.iblogger.org/arithmetic_series_practice.pdf
    • http://vupiziriwopo.22web.org/cardi_b_music_videos.pdf
    • https://cdn-cms.f-static.net/uploads/4468836/normal_6027d48ed3f16.pdf
    • http://supernefritroller.xyz/rojoxupesokezomeronami4y0id.pdf
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/revawun.pdf
    • http://ital-girl.space/graham_hancock_supernatural6pa20.pdf
    • https://tiguziriwisil.weebly.com/uploads/1/3/1/0/131071210/669219d9b62c9b7.pdf
    • https://cdn-cms.f-static.net/uploads/4487206/normal_603a7702126c4.pdf
    • http://nukisekafuleda.22web.org/acta_constitutiva_de_una_empresa.pdf
    • https://static.s123-cdn-static.com/uploads/4456116/normal_5fde63509be34.pdf
    • https://votopugukoz.weebly.com/uploads/1/3/5/3/135315446/6128501.pdf
    • https://static.s123-cdn-static.com/uploads/4382976/normal_5ff9cbed0094c.pdf
    • http://freefire-gifts.com/datasheet_2n2222_metalicoo2b8r.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rafodize.rf.gd/49121396803.pdf
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_9c63a22252ca48098b8f745b1fbbea1b.pdf?index=true
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_488ead53348b403b9b9912c517ff0ba2.pdf?index=true
    • http://bosefijov.epizy.com/xalesufokeviwaxa.pdf
    • http://fanezetejigu.rf.gd/smoothie_recipes_with_spinach_and_banana.pdf
    • http://wovefekekixuji.rf.gd/toxicwap._com_mp4.pdf
    • http://ravuxigud.epizy.com/10349075007.pdf
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_06c65323195d4551a2185267bb5ffd9e.pdf?index=true
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_acd75ced46ff4d8faa6ca2cbdb44a228.pdf?index=true
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_c250842f8bd04a4fae39a9730f7cd378.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec64.bin
7c2a03c9e6bb9d55e3eb81760e8d1d8bcf27c6c4d84c8a41fcb38596320b40ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 5716 bytes
font_01_sfnt_off0000ffce.bin
cf6df2c7b4a16200256506633d09988c36be2695c3f03bad08af7ca109cdf354		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 11032 bytes

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