Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a1f147f8227f07…

MALICIOUS

PDF

47.7 KB Created: 2021-05-19 05:01:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7273789d308b0c6373f6e59fc2e46f20 SHA-1: cfdd0756080ce5cece5e48fe7ee24c7f6aef83bd SHA-256: b2a1f147f8227f077fe6eadbb7c41b82d6a5ef90b9b2902ff73eff63dcd6139b
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 0.9013

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/431946152/roblox-character-free-game-hack PDF link annotation
    • https://tena-g.hr/files/coinmasterfree_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-earn-robux_GM431946152.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_003_off00004a38.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A38 27988 bytes
SHA-256: 7b2120383e1d940000cb6f45a7e0bc8265443352413c28612dc60fa94cb7c467
font_01_sfnt_off00008aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEA 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9792 18448 bytes
SHA-256: 05a96a9ae39645995e15b2d168b0f8c4367af40f40b0e0a665e781c288f1fec7

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