Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3fe44ff6d71507…

MALICIOUS

PDF

35.9 KB Created: 2021-06-18 09:04:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5a5b3094d68cfb3e49533f0c12b679a2 SHA-1: 19a469fe3c5db0c1fc79d7d57622f6da84a76776 SHA-256: bb3fe44ff6d71507d917bdd22eddbf1c1d2c0225389de6a23a97d0cdd71a539c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/free-robux-generator-no-download-or-survey-2021-game-hack PDF link annotation
    • http://ipdrs.org/images/robux-for-free-for-robloxcom-mobile4free24com_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/robux-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-password-roblox_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-get-any-jailbreak-car-free_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-800-robux-codes_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-site_GM431946152.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
font_00_sfnt_off000031dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DD 22668 bytes
SHA-256: 6d4bdef1533c182df550a3b9fcba07c3d372c422e1efb13b5a5a9fabd2349f2e
font_01_sfnt_off0000649d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649D 19908 bytes
SHA-256: f1e098a0672792bc554b8bcedab855719398c17f61dd369409a92eaf86f1f573

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