Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c58151c6a9e9ca3…

MALICIOUS

PDF

42.2 KB Created: 2021-05-17 05:34:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8cae3f128f9c45f17287ee6b2a045090 SHA-1: 3968615df72d2f62e15568112f49aa9b6bf97d3a SHA-256: 5c58151c6a9e9ca32639bf28ac25ffb7f85476669c4caf0243cdfbcf948d9bc9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and generators. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of malicious redirector links and the lure of free game items strongly suggest a phishing or scam attempt designed to lead the user to a compromised site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/blox-fun-info-game-hack In PDF document text
    • http://poltekkeskhjogja.ac.id/images/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4720 26948 bytes
SHA-256: d81584faaf1fd8175e0635d7358a01bd92ccba18e3b92994dbb6e72b180ed68e
font_01_sfnt_off00008390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8390 17928 bytes
SHA-256: 378f68af7bda96ca08821290e5d02393c78bb3c0fb942949d143c89702000491

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