Malicious PDF — malware analysis report

Static analysis result for SHA-256 811a116ff17db416…

MALICIOUS

PDF

41.5 KB Created: 2021-05-13 02:04:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 55f875986d1c34867fc5b874f21de2bc SHA-1: 99e993d1aed2340707f2e7d950ab736d4bb2e709 SHA-256: 811a116ff17db416c70c9c6ac8640f8e8da268845c9b4df661ea5f2662adf87d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links and a call-to-action phrase, luring the user towards game-related hacks and free currency generators. The primary link, https://netcdn.xyz/app/406889139/coin-master-free-coins-link-2021-game-hack, suggests a phishing or malware distribution site. The document's structure and embedded URLs strongly indicate a social engineering tactic to trick users into visiting potentially malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-free-coins-link-2021-game-hack PDF link annotation
    • https://dribledasortegaucho.com.br/uploads/files/master-coin-hack_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/block-best-robux_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/minecraft-free-computer-game_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_off000046a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46A5 25212 bytes
SHA-256: 12873138222279cf1db1eb36264e12728819e6cff7b5b46601709aca891b372b
font_01_sfnt_off00007fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDD 18284 bytes
SHA-256: be459003f2db1a934c49859962f2962ce704e042ee0985c73311b64c11e09449