Malicious PDF — malware analysis report

Static analysis result for SHA-256 b964e693cef17c4b…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 07:47:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1043a15051323cdc4c5a9435418ba48b SHA-1: 49276f288d1213da428ba3bc7daa5402983e94f5 SHA-256: b964e693cef17c4be9922829a55dd2093aecdd87be29c90e8b3ff53c2ed5677d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages, indicating a social engineering attack.

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/how-to-hack-a-roblox-account-easy-2021-game-hack In PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-roblox-catalog-items_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/best-ways-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/ben-10-roblox-free-games_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-robux-hack-xbox-one_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/without-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-no-verification-2021-android_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_off00003110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3110 22148 bytes
SHA-256: 94f748c8746aa56341a969b23b00208567cea82a424768dfa49a2bd4f322f1fe
font_01_sfnt_off00006224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 19644 bytes
SHA-256: 3c2604ed908c09dd80eef396d7e75b69619a54d380728d377e7f54a8b000dce0

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