Malicious PDF — malware analysis report

Static analysis result for SHA-256 314f509925e463ea…

MALICIOUS

PDF

42.7 KB Created: 2021-05-15 08:32:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9df09ac263b675c958386bc77cc913c6 SHA-1: e48e37da57a4afe394fd904b1898409b292a848b SHA-256: 314f509925e463ea864e53ab06444e4ce503fda107eb76781d3f7dd0709f213e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'game hack' which redirects to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into downloading a malicious payload or visiting a phishing site. The ML classifier also strongly indicated maliciousness.

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/406889139/how-to-get-free-spins-for-coin-master-game-hack PDF link annotation
    • https://jogjaindotrans.com/ckfinder/userfiles/files/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/roblox-people-girl_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/roblox-tracker_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/can-i-have-robux_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/coin-master-mod-apk_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_off00004c36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C36 25556 bytes
SHA-256: 78c52b3db3184844b0c3e748a02e38281af6c328fb6a3a1f2b851aa90f85bfa6
font_01_sfnt_off0000857c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857C 18052 bytes
SHA-256: 3cfae0e628493b06a11893ba870a091d0c1d4835c1ebffdd70b8f2a1c7d637a9

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