Malicious PDF — malware analysis report

Static analysis result for SHA-256 2826a71fc8262a90…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 06:57:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c3edaabdd73adb4406b7ef11c8ff644c SHA-1: 0e454bf0ae632f78dab72e9f022c407a05b30f44 SHA-256: 2826a71fc8262a90b925cda67ad59c8bf0741c4b2c0947497550bab8dd013414
122 Risk Score

Malware Insights

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

The PDF document employs a social engineering tactic, specifically a 'ClickFix' lure, by presenting itself as a 'free generator / game hack' to entice users to click on an embedded URL. This URL, https://netcdn.online/app/479516143/free-minecraft-hosting-game-hack, likely leads to a malicious website designed to exploit the user or deliver a secondary payload. The document's structure and the heuristic firings strongly suggest an attempt to trick the user into executing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.online/app/479516143/free-minecraft-hosting-game-hack PDF link annotation
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005405.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5405 26248 bytes
SHA-256: 6e346b9524b8570233c33226f8ffa316d3ff0d5715aa58c21f38c8bcd4075495
font_01_sfnt_off00008fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE4 2824 bytes
SHA-256: 32afe7424993ed77feed76f83a3afdb3d3391dbb877b7f4b0d7509f28dd06233
font_02_sfnt_off0000998b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x998B 17996 bytes
SHA-256: bf6ae4c6721fa3eadf2b386a9cfec38fcd2e671f0767c49619a657aa344fd652

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