Malicious PDF — malware analysis report

Static analysis result for SHA-256 258893657014baa0…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 07:55:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b30327ab9d7a55d71aad8ace13062681 SHA-1: c3b1facfa930fc184f4b42916a734ce4633366bf SHA-256: 258893657014baa0fdd506a17535eeaf80d530594cdb1e3da1c8e7d79923ad23
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting "free generators" and "game hacks" for popular games. The document body and heuristics indicate a lure to click these links, which likely lead to further malicious content or downloads. No scripts were extracted, but the embedded links and redirector behavior are strong indicators of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/coin-master-free-spins-usa-2021-game-hack In PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/earn-free-robux-for-roblox_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_off00005286.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5286 26412 bytes
SHA-256: 1945c91834131f3a73d812c484860448247236f657d16bc7afe88fa79e19a747
font_01_sfnt_off00008d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D30 18472 bytes
SHA-256: 16bf174bf6dc39212a7e0095f5095cb34a7632b0870544d55dc21d8537d09f5f

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