Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e175d0063df6aba…

MALICIOUS

PDF

50.7 KB Created: 2021-05-12 15:32:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5a055d3dafa7c2bade11f3ee23a5964e SHA-1: 76a7a3d8650c8afc33658d542a6e05bba406a054 SHA-256: 4e175d0063df6aba3a0d98e8047b14ef30b16aa77e8c382d6c081f92e45aa83f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The document body and embedded URLs reinforce this theme, aiming to trick users into visiting potentially harmful sites. The ML classifier also flagged this PDF as malicious, increasing confidence in the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://netcdn.xyz/app/406889139/free-spins-on-coin-master-game-hack In PDF document text
    • http://iedarelief.us/images/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/wurst-download_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/robux-download_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D6A 24776 bytes
SHA-256: 4945d70c1f0609eccf4a5b0319a7ce0989527917873582df9fb0a8cd4dbbe82c
font_01_sfnt_off0000857c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857C 3800 bytes
SHA-256: 9ee8676a2c0e03e267ddf0a0e961c13ae54972e3c288ee54026bc984454e8035
font_02_sfnt_off000092d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92D3 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_03_sfnt_off0000a4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4EC 17884 bytes
SHA-256: addbd5428a422ca7211e94293fed3a4f98c85d5f6337328d4d3623e90d90c649

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