Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bcb46d3f74ae89…

MALICIOUS

PDF

40.8 KB Created: 2021-05-11 07:36:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a31852216f6f3f6be6c555ebc2fc5e84 SHA-1: 843caf9244145011358f7846596c219ee83da703 SHA-256: e3bcb46d3f74ae89e628df633b2e6d3d4906da6b8661a1e92842647766dd0f4c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including a primary link to a malicious redirector disguised as a game hack generator. The document body and heuristics indicate a lure for free items or hacks, which is a common social engineering tactic. The presence of a link farm further suggests malicious intent to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-links-for-coin-master-2021-game-hack In PDF document text
    • http://dopheide.be/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/robux-offers_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/rewards-robux_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004579.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4579 24224 bytes
SHA-256: cb9bdd6c8a7ec8c8aa05144e3e138ed83a690313c542d235d9d0ae91bb0e0d5b
font_01_sfnt_off00007ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE7 18284 bytes
SHA-256: a2acd8bf1a51d4e254a7633d59ee55714bf8557f87202f8b12d552e9cd1876aa

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