Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1acc2f439aa63b…

MALICIOUS

PDF

43.9 KB Created: 2021-05-19 22:34:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4ce2509982626662a1a1870591e73af2 SHA-1: 57e9648a824e1b2bf84113ef2001cfcb9a523ed9 SHA-256: 6d1acc2f439aa63bbfc89ae13fc718dbeba27670992f288918dc7e55909d448e
122 Risk Score

Malware Insights

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

The PDF contains a lure for a 'free generator / game hack' which redirects to a malicious URL. The document body, though heavily obfuscated, contains references to Roblox and game hacks, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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
  • 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/431946152/original-roblox-game-hack PDF link annotation
    • http://io24.com.ar/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/is-tiktok-free-on-voxi_GM835599320.pdfIn PDF document text
    • http://io24.com.ar/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/pubg-uc-and-skins-smm-panel_GM1330123889.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/pokemon-go-free-quest_GM1094591345.pdfIn PDF document text
    • http://io24.com.ar/images/tiktok-free-ads_GM835599320.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004835.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4835 28076 bytes
SHA-256: d5271a8916c4dbd698a333b450d778758d3dd988e1b5f7fa2ecd47ff92813611
font_01_sfnt_off000088f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F6 18420 bytes
SHA-256: 07637e756c9e476f76e6aac07d93055443532b6fc7e48bcbb320a9c3212a4919

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