Malicious PDF — malware analysis report

Static analysis result for SHA-256 0312b2530aac0fcd…

MALICIOUS

PDF

35.6 KB Created: 2021-06-19 16:57:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a33ffa2764f985d5a779318807263151 SHA-1: 7616e44c0b12183aedec8eb07718461758bcc226 SHA-256: 0312b2530aac0fcd48d26b54148f7c9902d7898301c1c4df59aaf3aae9568486
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'free generator / game hack' lure. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting malicious sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of this document being used for malicious purposes, likely leading to further compromise.

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/free-1-word-roblox-usernames-generator-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-android-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/best-games-on-roblox-that-are-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/2021how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-a-robux-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-accounts-and-passwords_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-hacked-version_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_off0000316b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316B 22852 bytes
SHA-256: 8cb3c83a68b7f04e094ba1c0478bc46f6effaf31f05b5e1183d10bc05d5a965a
font_01_sfnt_off000064a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A6 19492 bytes
SHA-256: 028a4659341015b2ebe95576aa1f95595c1a44ad8928fcdb8a395e23ee9da09d

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