Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe08cc0d35966a1…

MALICIOUS

PDF

43.9 KB Created: 2021-05-15 23:00:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7a11992bd76653fab485869d704495c7 SHA-1: 79895571c30dcf596c1f5c10c52020274d3dbb31 SHA-256: bbe08cc0d35966a1d0574eb9ac049ef4d6e6eb75f9a6f542f1181dbe3fc266e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "game hacks" and "free spins" to lure victims. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-free-spins-2021-generator-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely leveraging social engineering to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/coin-master-free-spins-2021-generator-game-hack In PDF document text
    • http://zercalo.org/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000471e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x471E 24536 bytes
SHA-256: 347b410f22e91233d1716a157ce0e5707727dbbc2354337cab664c4f51cc6dca
font_01_sfnt_off00007f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1E 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000088d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D0 18288 bytes
SHA-256: 6314f2259b06a943d64bd11b5da4e77269207e3939d52c12000c78136d7b4f6c

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