Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc333b1456f5b095…

MALICIOUS

PDF

48.3 KB Created: 2021-06-03 09:52:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5e8171ee41b3916ca2ffa8fc3340b661 SHA-1: 918fb41af98af9f7fda1d66571b0f07aaab142f3 SHA-256: fc333b1456f5b0952acaf68967366242aef944c594a5a81be5e6272681920bbe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically advertising game hacks and free spins. The document body and heuristics strongly indicate a social engineering lure designed to trick users into visiting these malicious URLs. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/coin-master-daily-free-spins-link-today-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/picture-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-game-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-app_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_004_off00004f72.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F72 26904 bytes
SHA-256: 8334be279455aac47cb8f8da780b12cab0370fb838ba47269f5913a54a550fda
font_01_sfnt_off00008de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE3 3400 bytes
SHA-256: 75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24
font_02_sfnt_off00009907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9907 18652 bytes
SHA-256: b7acebacf47409c7f0f2932ba41e4c1dc120b4ef5280387cf9333091bd47b2e0

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