Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9adcf2df76a3364…

MALICIOUS

PDF

35.1 KB Created: 2021-06-26 05:58:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9702bb2698bd4e603d6f24e3f536ae13 SHA-1: c01b31ecb8c484ae14c9b813b4b2418ed3dd5b37 SHA-256: f9adcf2df76a336470c8d62d9b13be36adcdea735717a9e089c852929e97166e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack lure, directing users to a malicious redirector URL. The document body and embedded URLs reinforce this lure, aiming to trick users into downloading a payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/hacking-engine-for-roblox-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-prices_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/flamingo-free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-prison-life-v202-gui-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-ro-ghoul-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-fashion-frenzy-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-into-a-youtubers-roblox-account_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/is-getting-free-robux-illegal_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/at-which-game-have-free-robux-at-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-com-redeem_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
font_00_sfnt_off00003140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3140 22936 bytes
SHA-256: a0995d69602d1016c0f9db48d8bd27310a17ea1ffd2c05d7966c2be4e4301d7b
font_01_sfnt_off000064bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BC 18940 bytes
SHA-256: 07542361ce755b4e7f7f5a7ef4920caa6cedb2aad5065304d4d299d9334070fc

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