Malicious PDF — malware analysis report

Static analysis result for SHA-256 4437d3afa3886f08…

MALICIOUS

PDF

44.5 KB Created: 2021-06-11 07:50:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9c6e2144be8ef0fd31e04df567b65ce8 SHA-1: 62d95323ec0e57d4e473c3826e496c545480b254 SHA-256: 4437d3afa3886f086aec45e215330980afdead2d8db5f9fb52cef1ef811d5d97
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users with promises of free game items, redirecting them to malicious infrastructure. The primary redirector URL is https://netcdn.tw/app/431946152/all-free-emotes-in-roblox-game-hack, which itself hosts further PDF lures. This indicates a phishing or scam campaign aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/all-free-emotes-in-roblox-game-hack In PDF document text
    • http://baxtton.com/sites/default/files/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/invincible-hack-roblox_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/robux-generator-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/roblox-land-free-robux_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
stream_004_off00004fc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC1 25576 bytes
SHA-256: 3c82d25b0d3513d04b833aeeebb8749a252cfbbd6c9f040dd0b5c143a8b67170
font_01_sfnt_off00008b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2F 18312 bytes
SHA-256: d305ad3bdfd6ddf42e4f4429b4ceca55245dc74b9ccbdf5e477ef244b75dab69

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