Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc5d91ba6f2b597…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 09:09:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0f7beeb3f9dc0f1445a98ee6e2c7005a SHA-1: 38c8afcfbf3de4edc75d3913cf34c94847e0bc8f SHA-256: 0fc5d91ba6f2b59726bbec313b55cd785968bc639bf01c447cc6d0ed10217823
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically disguised as "game hacks" and "free generators" for popular games. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary malicious action observed is the redirection to potentially harmful infrastructure, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/www-coinmaster-com-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/level-coin_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-no-email_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005183.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5183 25640 bytes
SHA-256: 5a9f3b417d5a70553e715426c5a22f91739cebaa4beff368e8e4409238dbacd4
font_01_sfnt_off00008c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C02 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000095b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B4 18168 bytes
SHA-256: 75b99695cbe667c25efb0bdf9da0f2f1162430bd972575524760b0379ebe116f

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