Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8430a37ac2c1d0…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 16:00:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2c388210feed7d31c049beee187e70d5 SHA-1: 2c6b14b2f4fbf23a662e47dde45a3436784f2af8 SHA-256: 1d8430a37ac2c1d04e3f8919be9b8240e282cb2812974a598bdb5a12e51e823f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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
  • 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.xyz/app/479516143/minecraft-windows-10-hack-client-2021-game-hack PDF link annotation
    • https://www.gymun.cz/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/robux-miner_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-items_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-hacks-pc_GM479516143.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_003_off00004608.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4608 24312 bytes
SHA-256: 5c8d26dfb8f0ba590be9263e7408a0fe11eeb5a1e7f68285c5f002a373db0d1b
font_01_sfnt_off00007dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBD 18892 bytes
SHA-256: 54639ec1e5a0ee3fa3fc1cac5921c09ae703af0deb08d5069a7095b9a5c5a121

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