Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a8db183927df18…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 08:18:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0a09c03c91c8ac5491868efd3ac9a8c9 SHA-1: bfb145d91437e63b036c4ce162cfb23696169359 SHA-256: 42a8db183927df18ecc78823c1430234eb1dcfd2d1db2b746553e8be4c54d248
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, masquerading as "game hacks" or "generators". The primary lure URL is https://netcdn.xyz/app/431946152/robux-free-c-game-hack, which is part of a known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/431946152/robux-free-c-game-hack In PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-spins-coin-master-2021-no-verification_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004872.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4872 25280 bytes
SHA-256: f6d697328c1f7b9b2356bdaa33c0890bf6b95b644546f591879af20bb989ec64
font_01_sfnt_off000082d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D0 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off00008c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8F 18012 bytes
SHA-256: 3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73

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