Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f716eccbbe9b57f…

MALICIOUS

PDF

45.5 KB Created: 2021-06-11 06:53:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9fa2a284770a6c5389e4d6ccd4ffc2ec SHA-1: b6e87d81f818c2251558084fc80311714e10a135 SHA-256: 3f716eccbbe9b57f476c9adeaa9d385446b18e1f4aa31ce2a601de60aaddb041
200 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, including one identified as a malicious redirector impersonating Walmart. The document body, though partially corrupted, suggests a lure related to game hacks or free items, aligning with credential phishing or malware distribution. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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/how-to-hack-roblox-buiding-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/how-to-hack-roblox-buiding-game-hack In PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack-script-2021_GM431946152.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/get-me-robux-for-free_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_004_off0000524d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x524D 25540 bytes
SHA-256: 011d1cc9115ee32987be8f85608461a213b0a363a7feb1100ec80b219cd0768a
font_01_sfnt_off00008cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB3 19068 bytes
SHA-256: 0f4f70a3b16f78d12a6753989566b422bd73bb6554c53d05a30f907e25aff301

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