Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e6f37c078d6fca…

MALICIOUS

PDF

48.6 KB Created: 2021-06-10 18:23:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 638e0888638a8babc225408656613bae SHA-1: 1be8c4bf3eff7c4c8aaf079b61d7276de5293778 SHA-256: 93e6f37c078d6fcaf2882fdc35f61687457f311148fb7c98d42cd4e4b78b636d
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of 'free Robux' and 'game hacks'. It also displays a fake CAPTCHA to trick users into interacting with the malicious content. The embedded URLs likely lead to further stages of infection or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.tw/app/431946152/free-robux-gift-cards-2021-codes-game-hack In PDF document text
    • http://shapemybrows.id/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/booga-booga-in-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/hack-coin-master-apk_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_004_off000051bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BB 26288 bytes
SHA-256: 2dfa08802ad13d733776b8cc73e5b8425b2d309f8cfd976c8b1bd9e307f470a5
font_01_sfnt_off00008ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED9 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000988b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988B 19044 bytes
SHA-256: a83203ba6d4d8e4db234da74518c811315008a13a6a61ff598d06d89853e7c2b

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