Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b35780d5b32ded…

MALICIOUS

PDF

46.6 KB Created: 2021-05-13 19:29:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 37e9b1a7b4ab9ec4126ea31c84fecf60 SHA-1: cf4b271a2098f4f012906e35542f48f9366c4df0 SHA-256: 76b35780d5b32ded4d85da7688b0bdfdec403640bcccfd9a14659a476c26ebc9
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. The primary link, https://netcdn.xyz/app/431946152/roblox-hacked-com-2021-game-hack, is identified as a malicious redirector. The document's structure and content strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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
  • 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/roblox-hacked-com-2021-game-hack In PDF document text
    • http://ikig.ru/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/free-coin-app_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://ikig.ru/images/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/www-coin-master_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C4 25556 bytes
SHA-256: 870b15f1d372392c46239ef94b31752df5d0ff443760a97fac878b5979d5d518
font_01_sfnt_off0000846e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846E 3924 bytes
SHA-256: 34808cbdc2db19cbc9ea3bad516c09c4923a530123a803b5e1969769d22d9e84
font_02_sfnt_off00009147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9147 19016 bytes
SHA-256: 1bdffeea421802d48c0c5f4972bc43262882194040db90b4400103ab0d186a68

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