Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f64703646a2537…

MALICIOUS

PDF

45.2 KB Created: 2021-06-11 09:17:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 418b6e9f868594414f54a5ea31f33e12 SHA-1: bf1a1e8b984d5a8ee1072d6763430b6ee3974839 SHA-256: a6f64703646a253747d1a0decacd277f435bd95e740b58a6f85aa53b8cb63887
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to malicious redirectors, impersonating brands like Facebook and offering "game hacks" to lure users. The primary malicious URL identified is https://netcdn.tw/app/431946152/hack-robar-cuentas-de-roblox-akaka-game-hack, which is associated with credential phishing and potentially further malware delivery. No scripts were extracted, but the document structure and embedded URLs strongly indicate a phishing and redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/hack-robar-cuentas-de-roblox-akaka-game-hack.
  • 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.tw/app/431946152/hack-robar-cuentas-de-roblox-akaka-game-hack In PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-coding_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-hack-com-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-activegamer_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
font_00_sfnt_off00005353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5353 25040 bytes
SHA-256: 772c71872e2496687590b45e7ac6ba3fc68108f14df8317355202b14922f0754
font_01_sfnt_off00008cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF5 18592 bytes
SHA-256: 1b301b106d48d2ffcb41516ad74a4574290fc854c414c83648238f73202b37b7