Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfc544762742309…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 16:22:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2eb18f07ab619fd969fb388df9d5d3a5 SHA-1: a9d214fe7d6f5356bcb10c0ce66c3602d682fc9e SHA-256: bcfc54476274230976b3350f494421c80f28b62f4b3546fff18855d3a90966aa
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free coins'. The document body and heuristics indicate a lure for free game currency or cheats, likely leading to a phishing or malware download site. No scripts were extracted, but the primary attack vector is the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://netcdn.tw/app/406889139/coin-master-free-coins-link-march-2021-game-hack In PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/tiktok-free-search_GM835599320.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-hacker-us_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_002_off00003299.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3299 23524 bytes
SHA-256: 7067a2d956cd40cdd6e1a0b09a2e2fbf0c2e9be4e008319e90f5e898fe43e8eb
font_01_sfnt_off00006800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6800 18736 bytes
SHA-256: 1810aa1194408988f889930d2b316369f9abc71c28062134bfa3042e826aa82e

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