Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4352ac0e86a2e0c…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 02:25:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a74f8ed3c4ff243429b0667efec4f6d1 SHA-1: 7026f51c261b06da4fdfe2400e84d32087d809e6 SHA-256: d4352ac0e86a2e0c5c123da52ba6d72929303fa29210e4f37ac218f853df9608
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators. The document body and extracted URLs suggest a lure for users seeking free in-game currency or cheats, leading them to potentially malicious sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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.tw/app/479516143/if-you-delete-minecraft-can-you-redownload-it-for-free-game-hack In PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/how-to-hack-le-bote-roblox_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/free-robux-stolen-account_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/free-robux-no-verification-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/roblox-robux-generator-no-hack_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/free-robux-100-legit_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/free-account-passwords-roblox_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/shadowrun-skip-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/getting-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://easypay.af/uploaded_files/userfiles/files/roblox-prison-life-v20-infite-ammo-hack-2021_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_off00003593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3593 22144 bytes
SHA-256: 1a19cff8b02e4d594937ab8bf0b7cd8a64a7e184bf8352a6b6d51174040260b1
font_01_sfnt_off00006699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6699 18880 bytes
SHA-256: ac981c3c32f0063602c6c806105b845cd6f419f094116d8ee59a5a70b57cb270

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