Malicious PDF — malware analysis report

Static analysis result for SHA-256 9729b27a9779fa2b…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 23:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bd7e4a154beffc5fb9fe34d9603b2411 SHA-1: ac18d24a64458935a0fa37a14d7876a71481a5e1 SHA-256: 9729b27a9779fa2b51fcc924d1d8ccc927e85567cb0b08360a8e39a83eba1700
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free followers". The document body, though partially corrupted, contains a URL that matches the heuristic findings. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/835599320/how-to-get-free-followers-on-tiktok-game-hack In PDF document text
    • http://library.ulb.ac.id//repository/robux-money_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/bit-ly-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-village-3_GM406889139.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_off000053b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B8 26952 bytes
SHA-256: 956b6b7f960a3aad81cb04d3f7484a56fe058c294ac4043977d63286a12866a2
font_01_sfnt_off00009142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9142 17692 bytes
SHA-256: c8a0034b4012066e27b368389264813a3515151838273d971ed31104f84b04bc

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