Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50d23630562e512…

MALICIOUS

PDF

43.4 KB Created: 2021-05-19 06:06:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 30af0db2913c3a550850021d569696b7 SHA-1: 8426c3ecb8d2e6f81c5d86b6f77f598ca0071e5a SHA-256: a50d23630562e5120be5a0bf97838b7d82d42f2e2ee48e847374a0dea76dac8a
200 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and potentially malicious domains, masquerading as a 'free generator / game hack' lure. The document impersonates Facebook and uses a call-to-action phrase to encourage clicks, indicating a credential phishing or malware distribution attempt. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/is-it-possible-to-get-free-robux-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/is-it-possible-to-get-free-robux-game-hack In PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-game-free_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-offers_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_off00004ba6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA6 26344 bytes
SHA-256: 76a2663e28f45f344b6eaf439d0d41ed1e97924d58855b646a39c45ed4fd3d51
font_01_sfnt_off00008701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8701 18464 bytes
SHA-256: 524b785793646940a6547919a11f6df6f4967036cf63710b5a4934c88ca16ae7

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