Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc82ce7b6f384b81…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 08:56:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: be1418e6f6e622fa1a6d511e7a0f02bb SHA-1: 0be08b4eaf70acdf7641a5f6df0badfdc5793a65 SHA-256: fc82ce7b6f384b813db5520b0a05eafa0a567e906a972279d062d3cd4e0b5f36
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 0.9971

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/479516143/minecraft-bedrock-free-download-game-hack PDF link annotation
    • http://www.yes-info.fr/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://www.yes-info.fr/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/roblox-demon_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://www.yes-info.fr/images/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://www.yes-info.fr/images/coin-master-hack-apk-download-for-android_GM406889139.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_off00004892.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4892 24992 bytes
SHA-256: 2fca8ff9a7c7624f57237414445c1a108031b2a7aef872e87d23f05959b5f2cc
font_01_sfnt_off000081b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B8 18676 bytes
SHA-256: 46ea590fdaaf2f51a0970c42df6cd5b4a0b4c3c6274823dd639632707821995f