Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be18bb36a8c7d1d…

MALICIOUS

PDF

36.9 KB Created: 2021-06-30 19:23:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: bd01309835bbf73f781d0de2802ed547 SHA-1: 2c1d1a269289b0e0261ae28235abc7a92b293b17 SHA-256: 6be18bb36a8c7d1dc64d538e399994c163e910f67f4bfd098bdd96e6ca3aa019
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.co/app/431946152/cheat-engine-btools-roblox-hack-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into downloading potentially unwanted or malicious software. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/cheat-engine-btools-roblox-hack-game-hack In PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-reedem_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/gangnyc-hack-2021202169-limited-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/i-got-hacked-in-roblox-lost-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/robux-online_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-no-download-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-cp_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-free-robux-hack-easy_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-2021-pc-easy_GM431946152.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
font_00_sfnt_off00003722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3722 23252 bytes
SHA-256: 2437de36bad69ed65c4a5f323ee0ee0ac42e330e0821f9411436266db24f3c74
font_01_sfnt_off00006b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6C 19044 bytes
SHA-256: be5c504d839b616e68761cccc55de51204f572cbe27063068f573c9125d12442

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