Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22770e93a1699df…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 05:12:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 06ac497f1410fbd803bf8145106da6a3 SHA-1: 23188113fb02f4d20d80032ef4f258b3daaafe59 SHA-256: a22770e93a1699df434b62f92fe148ca3c8a689052a7a702c205edce1bec5d61
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including a prominent one to 'netcdn.tw' disguised as a 'free Robux generator' or 'game hack'. This lure is a common tactic for phishing or directing users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful external resources. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/431946152/how-to-get-free-robux-without-doing-anything-2021-game-hack PDF link annotation
    • http://www.peterbarsony.com/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-pet-simulator-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/console-free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-1-million-robux-free-birth_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/pokemon-go-free-team-medallion_GM1094591345.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/no-human-verification-hack-for-coin-master_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
font_00_sfnt_off00002fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB0 21972 bytes
SHA-256: 0a472347e7f567c4d9493c6dcee070ec29da24e7248ec5ebd6a63668666f0aa1
font_01_sfnt_off00006054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6054 20220 bytes
SHA-256: 9b30e2885eb5843fedd856b186065d0d919d61cb100e3271a00bcc18fb5681c8

Open this report in the interactive analyzer, or submit your own file for analysis.