Malicious PDF — malware analysis report

Static analysis result for SHA-256 275829b8821dedc4…

MALICIOUS

PDF

34.6 KB Created: 2021-06-23 02:42:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9956ef64e5c753a25141102d12737ecc SHA-1: d0b6b5a84e7a1a6c77c6b7c28ea634f8df8c6504 SHA-256: 275829b8821dedc4c4046eb04aa1fdf05e36fa11fea337bb1197bbe01f802436
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 'free generator' and 'game hack' lures. The primary redirect URL is http://netcdn.co/app/431946152/free-roblox-followers-2021-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing or scam attempt.

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/free-roblox-followers-2021-game-hack In PDF document text
    • http://amcoeur.org/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://amcoeur.org/images/roblox-superhero-bundle-free_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/free-robux-hack-on-pc_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/roblox-cframe-cheat-sheet_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/roblox-how-to-hack-into-someones-account-2021_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/roblox-jailbreak-free-vip-server-2021_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://amcoeur.org/images/hack-roblox-with-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/how-to-create-a-roblox-shirt-for-free_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/how-to-hack-into-anybodys-roblox-account_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/royale-high-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/fairy-tail-ultimate-adventure-roblox-how-to-hack_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/money-cheats-sims-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/rake-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/how-to-get-free-robux-apple-phone_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/free-roblox-account-v3rmillion_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://amcoeur.org/images/free-robux-please_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_off00002f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F54 22516 bytes
SHA-256: 958371a8253946be7a8cc966a6a9fd0a7260372475a5ef36a27409e525621a10
font_01_sfnt_off000061a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A4 19216 bytes
SHA-256: 5b251481b2a0b6ae8f9268f72f44fe0dd9b31d073dc7bc1ae5edd93024a5ef16

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