Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6ed5aef4de0a7a…

MALICIOUS

PDF

41.8 KB Created: 2021-05-20 02:16:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bbe365ab695e5ddbb14802af9969ef5f SHA-1: d2dfe4301621c70eef4428b2216c0775c24b53af SHA-256: ed6ed5aef4de0a7ada995e27d40f9b6cb3046eff395dff2e369580940f4f262a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector. The lures used, such as 'free generator / game hack' and 'free texture packs for Minecraft', are designed to entice users to click these links. 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 0.9971

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.xyz/app/479516143/free-texture-packs-for-minecraft-pe-game-hack In PDF document text
    • http://knjiznica-oroslavje.hr/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/robux-withdraw_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-trolling_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/pubg-uc-price-in-uae_GM1330123889.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/simplysarc_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/hack-free-spin-coin-master_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_off000048ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48FF 24252 bytes
SHA-256: 8d9b7f5b3bc3a2efe8c3de2fde95d2dca50140583c9d2eb9b14679bb02eda32f
font_01_sfnt_off000080a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A1 18384 bytes
SHA-256: 4bd922cb808520f712e6f68915d55ea385c9bd17e049420b207e71ca6d562f93

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