Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e331891dc810bcf…

MALICIOUS

PDF

33.1 KB Created: 2021-07-06 17:01:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e4fd256b9b2c16918c920103227ecc48 SHA-1: ef8cdb45c61a29fae2f843db86ff055ef94b859d SHA-256: 5e331891dc810bcf8479c7cdd2f3472204908a861d797e85cd9058857337061b
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to a known malicious redirector, specifically http://netcdn.tw/app/431946152/roblox-free-clothes-generator-game-hack. The document body and heuristics indicate a lure for game-related cheats and generators, likely to trick users into downloading further malware or visiting malicious sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.tw/app/431946152/roblox-free-clothes-generator-game-hack In PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/hacks-for-roblox-no-human-vertifcation_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/escape-room-roblox-cheats-theater_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-do-i-do-if-i-was-hacked-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-get-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-robux-tycoon_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/codes-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-robux-bots-allowed_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-cool-gear-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-hack-wins-on-roblox-martial-arts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-polyguns-codes-free_GM431946152.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
font_00_sfnt_off00002c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2A 22040 bytes
SHA-256: 472733d729bc8f402f5fa58c264013c7c73a589597cf9e858175fa78f30755bb
font_01_sfnt_off00005d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0D 18920 bytes
SHA-256: 168b44f383469b980ccfd12afc6a57c15e96a954b5575884cb06f059eb884acb