Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f71ffa21ec80712…

MALICIOUS

PDF

41.3 KB Created: 2021-05-18 00:31:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 36864978161e08b3213b32bb2020791c SHA-1: 28f6fd82424abc52a67c4544e4e9085218755be4 SHA-256: 1f71ffa21ec80712a613f696a4f578a0e3c948c837beeb9c44c576a69383c5ad
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 game hacks and generators. The primary lure URL is https://netcdn.xyz/app/406889139/how-to-get-free-spins-in-coin-master-2021-game-hack. This indicates a social engineering attack aimed at tricking users into visiting potentially harmful sites. No scripts were extracted, but the embedded links are sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/how-to-get-free-spins-in-coin-master-2021-game-hack In PDF document text
    • http://force-seniorklub.dk/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46D8 24792 bytes
SHA-256: 695a89037c9fe2b38b016bf56597ceea1ff675a862909195c701282b98c79b12
font_01_sfnt_off00007e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E85 18452 bytes
SHA-256: 614b442f464a30c8e1247073dd83761b8901fda729b002daf0f1775ab60cf60b

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