Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff10d5eb79d74e1…

MALICIOUS

PDF

52.1 KB Created: 2021-06-08 21:15:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fc85a6a30cf85b9df5ecd56ed8598994 SHA-1: b7a37652aa295a2f7b2e307a7a073eb86c32077e SHA-256: 4ff10d5eb79d74e112969620656dacb1e356ea1453dd14a0280d485799df91df
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users into clicking a link, which redirects to a malicious URL. The presence of multiple game-related URLs and the 'game hack redirector' heuristic strongly suggest a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/comment-hacker-roblox-version-anglaise-game-hack PDF link annotation
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-obc-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/pokemon-go-free-legendary_GM1094591345.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.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
stream_004_off000051f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F6 38312 bytes
SHA-256: 69113580b15d2141586dac5b0382dd941be90319f4b2724471b49b6c6ba8879f
font_01_sfnt_off0000a720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA720 19088 bytes
SHA-256: 1627ad0fecffbf914f95dd03604fefb4a4f35e6ef83a360bb03f3ad8e34f14e6

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