Malicious PDF — malware analysis report

Static analysis result for SHA-256 af634afd95dbc022…

MALICIOUS

PDF

44.4 KB Created: 2021-06-11 10:53:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 80d29132af65ee11c93226257c28115f SHA-1: e1f4d1243447d966702b8571f4b07873fc550096 SHA-256: af634afd95dbc0222a16ad821a6269fd4d09e881332d7e14b9f5e1040a1428b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains embedded links that redirect to malicious infrastructure, masquerading as a 'free generator / game hack'. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links suggests a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded URLs point towards a lure for users seeking game cheats, likely leading to a secondary payload or phishing site.

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/free-lvl7-full-lua-roblox-game-hack In PDF document text
    • http://boliviagasenergia.com/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://boliviagasenergia.com/images/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-how-to-make-a-private-server-for-free_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/client-minecraft_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://boliviagasenergia.com/images/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/haw-to-get-free-robux-in-windows-7-2021_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_off00005073.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5073 25600 bytes
SHA-256: 0a76ef19a8af3326103288b901862d1b364085c10b93f209a71fb8e0c0e017dc
font_01_sfnt_off00008a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A58 18484 bytes
SHA-256: b0399b7e6eb43820c3bd46add520a019b86873e5acd9395d65425f6e111845e7

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