Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d090dbf441ee105…

MALICIOUS

PDF

47.6 KB Created: 2021-05-17 04:42:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 163161d4c753508b5bc519188d45b702 SHA-1: 07d99fdf600b228f486b20ca0667833d38322f36 SHA-256: 5d090dbf441ee1054f514a9e67ad5e0eb155a49fe8cca3410b21856efd484d15
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/406889139/no-human-verification-hack-for-coin-master-game-hack PDF link annotation
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/oprewards-com-roblox_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_off00004e35.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E35 28104 bytes
SHA-256: e6e7181ee935037ecb43ab1c90f7f2a3591c507edbbc7b168d4a51398e359a80
font_01_sfnt_off00008e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E03 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000097a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A4 18416 bytes
SHA-256: e2def261e9c0d489920ca96f0bc353b112c40b7f6e818ee8e160ca61827c750c

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