Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd31d88aaa42226…

MALICIOUS

PDF

44.7 KB Created: 2021-05-12 01:09:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b6cd668f3c9c95437026bb358f4cc8de SHA-1: eda2e7b23e444e5f644a822d70707415176a269b SHA-256: abd31d88aaa422263d617f1f63f9c9b15af48ef1e8af9ceb4cf6cabf3f93aa60
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA 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 0.9632

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/free-coins-game-hack PDF link annotation
    • https://bapalaye.org/images/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • https://bapalaye.org/images/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://bapalaye.org/images/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • https://bapalaye.org/images/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • https://bapalaye.org/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://bapalaye.org/images/rbx-hut_GM431946152.pdfIn PDF document text
    • https://bapalaye.org/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://bapalaye.org/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://bapalaye.org/images/coin-master-fan_GM406889139.pdfIn PDF document text
    • https://bapalaye.org/images/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • https://bapalaye.org/images/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://bapalaye.org/images/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://bapalaye.org/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://bapalaye.org/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://bapalaye.org/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://bapalaye.org/images/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • https://bapalaye.org/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://bapalaye.org/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://bapalaye.org/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://bapalaye.org/images/how-can-i-get-free-coinsn-coin-master_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_off00004709.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4709 27244 bytes
SHA-256: 9fa829feaa4874e7faa163f573191bae6bdd785f2968fc4ea11e3758cfa4f67f
font_01_sfnt_off00008546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8546 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF7 17380 bytes
SHA-256: 4587a0da3d318d3aab2e4d3a2e17e88175961c64bd2fb3ac3dbf4933656e475a

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