Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ff4394c3b33dd9…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 00:25:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d8a20c8afcfba6e84ef493b42d585b3b SHA-1: ca06bf7f1d04dda8c33ad0e6c6e09e42dcba28b1 SHA-256: 56ff4394c3b33dd938b6130855ade0d64a17a64c089c6f29339771950fdd5689
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and generators, directing users to a known malicious redirector. The document body and embedded URLs strongly suggest a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted from this sample, limiting the analysis of further execution steps.

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.tw/app/431946152/free-roblox-girl-hair-not-a-model-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/free-army-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-bots-for-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-android-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-roblox-prison-life-on-chromebook_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacking-as-a-guest-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/add-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-crack-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pokemon-go-best-free-outfits_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/before-dawn-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-without-downloading-stuff_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-free-ios-2021_GM479516143.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_off00002fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA3 22528 bytes
SHA-256: 8cc21528904f975da97ba8883a324675ac9d784a86fbe77ba08975842918f51c
font_01_sfnt_off00006236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 19244 bytes
SHA-256: 8356b87a120d1d4179b1bde110c20dc93916ea20440c858ad67221c506579707

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