Malicious PDF — malware analysis report

Static analysis result for SHA-256 7199238968be5ef0…

MALICIOUS

PDF

45.6 KB Created: 2021-05-20 01:05:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ee57b19c6818ba91418403197a614be6 SHA-1: 2897d29a3a81eaa140fd25ceac6f4ba984eea52c SHA-256: 7199238968be5ef01a662c29b891e76fc40a3919ee9c6c8db1484faced63688a
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run 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 0.9507

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.xyz/app/479516143/minecraft-bedrock-free-download-pc-game-hack PDF link annotation
    • http://guimaq.com.br/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://guimaq.com.br/images/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/collect-robux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://guimaq.com.br/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/hack-coin-master-free_GM406889139.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_003_off00004af5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF5 24992 bytes
SHA-256: 1056c5ac4a52fffaec806fb94d7c08ca0c654746edcd20d8d1236968f21c83f8
font_01_sfnt_off00008483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8483 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E35 18828 bytes
SHA-256: 744b4361c7b50ab0c54bda7008ddb1699961116dc3c405c5ee3c1e77c5f65438

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