Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e7f7b80e3c8edb…

MALICIOUS

PDF

35.6 KB Created: 2021-07-01 17:29:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 44fe7c6f970541edf7fcd8e3de8fc1e7 SHA-1: ab261f355603926c5e318b404e3c4f4fb71c7727 SHA-256: 82e7f7b80e3c8edbe13cef8626f04e3b4e79acb343d10543af5f6f257ab151c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector. The document body explicitly contains the malicious URL, reinforcing the lure. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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/free-robux-codes-to-type-in-chat-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/how-often-pubg-uc-advance_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/gratuit-et-sans-code-hack-roblox-mad-city_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-how-to-play-games-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/wurst-download_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-free-robux-eu5_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-is-using-cheat-engine-hacking_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/dungeon-quest-roblox-item-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-roblox-booga-booga-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/flood-escape-2-infinite-jump-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-live-stream-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-javascript-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B4 22648 bytes
SHA-256: 6dc0a00d92b28bbb89560ac105f881b7e084fb28cdd36f0fb10fac6a81fbda9d
font_01_sfnt_off000064c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C0 19516 bytes
SHA-256: 77f0ad3840b91fd8a578df0b998a1f0a8c3ba0eda3a37e0b7e9a158db43edb44

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