Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fad7d30b5ff664…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 23:07:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 34cc1cd1b8a9105c69a4865757665ca0 SHA-1: 527e375712ffd9d2903fec910ed34f1761fd10c2 SHA-256: d2fad7d30b5ff6648d2efa0318a963bf33bb6ad7e61903a551cec3b98f38f76e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hack generators. The primary malicious URL identified is https://netcdn.online/app/406889139/games-like-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a social engineering lure designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/games-like-coin-master-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/is-pokemon-go-free-on-ipad_GM1094591345.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/instantrobux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/pubg-uc-hack-apk_GM1330123889.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-exploit-roblox_GM431946152.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_004_off0000534e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x534E 25792 bytes
SHA-256: 226a559380248735b43fcbf4949522f808319f4b6e09a4044edfcf9bd1d2b950
font_01_sfnt_off00008dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC0 2880 bytes
SHA-256: aa3d9316068b9037d3bd098234d4f028cff103c619c9dd7dfbf18a3fc4a03b16
font_02_sfnt_off000097ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97AC 17976 bytes
SHA-256: 2545fd845a8b9b89b0f46202648a02af0cc4ccf8f9f45e2a3997a5201f678305

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