Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f06645fe837a7bd…

MALICIOUS

PDF

48.2 KB Created: 2021-06-11 10:00:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ba91ff77627023893feac36ec3192601 SHA-1: 8c737c760836669182d804fcf11f50b0369577ad SHA-256: 5f06645fe837a7bd304edbd79e12478c6b1c974795bd72239dc5911bba0b5ccd
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 0.9871

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.tw/app/431946152/hack-robux-infinito-roblox-2021-marzo-game-hack PDF link annotation
    • http://dana1157.com/images/free-white-shirt-on-roblox_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-codes-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/how-to-hack-survoivr-in-roblox-pc_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-please_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
stream_004_off00004fdd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FDD 32596 bytes
SHA-256: 308ac6d28885a7d46caca14bb6d1247c41d0cce6fb95d3f5d39746849ce4a432
font_01_sfnt_off00009742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9742 19228 bytes
SHA-256: 7e50a6b6853fb5d1f3868dc6bc2e375e2de4cc0d00ab79d78308fffa92616921

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