Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4448d7f263b7d44…

MALICIOUS

PDF

42.6 KB Created: 2021-05-11 09:21:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b00d45ca3a70a74695fcf3f8f1cab5f9 SHA-1: 285fd6a8fadbcde5f643d2060ff371a854122156 SHA-256: a4448d7f263b7d4452d7486a1e98dae3aa2391bff22f8cb6ddc59b08dd17f631
200 Risk Score

Malware Insights

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

This PDF document employs a brand-impersonation lure, specifically mentioning Netflix and Roblox, to trick users into clicking embedded links. These links redirect to malicious infrastructure, such as 'netcdn.xyz', which is known for hosting malware or phishing pages. The document's structure and embedded links suggest it's designed to exploit user interest in free generators or game hacks, ultimately leading them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/blox-fun-info-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.xyz/app/431946152/blox-fun-info-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-2021-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
stream_003_off00004b44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B44 25080 bytes
SHA-256: a727368055ebecac4da7936b2fcf3722ad899cd5d79d0cdfc122f56d660586f3
font_01_sfnt_off00008577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8577 17928 bytes
SHA-256: 378f68af7bda96ca08821290e5d02393c78bb3c0fb942949d143c89702000491

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