Malicious PDF — malware analysis report

Static analysis result for SHA-256 78db9c2eced73ab5…

MALICIOUS

PDF

44.1 KB Created: 2021-06-09 07:33:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6dd99489923f4590985d1cfca9f6cabb SHA-1: fddcc18de25ff99cc0f6a71320ebaf78712eeb8d SHA-256: 78db9c2eced73ab54338950e4d534dc1eeec936393543babf1622ede34a1d104
102 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 0.9865

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/free-robux-android-2021-game-hack PDF link annotation
    • http://103.40.122.33/akasia/repository/roblox-admin-panel-robux-hack_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-this-site-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/idsk-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-any-roblox-high-school-car-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-jailbreak-how-to-get-free-money-used-cheat-engine_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-people-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/games-that-give-you-free-robux_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_off0000502d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x502D 24736 bytes
SHA-256: 9a1314ab5b412f7861df7ef401ad87049544c9cd605d9ba86f86226ba204f998
font_01_sfnt_off00008847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8847 18712 bytes
SHA-256: 8bad1a6728ac2f577545f8f6d1bc00a1c94167d6981a4a29a20f2f221244de03

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