Malicious PDF — malware analysis report

Static analysis result for SHA-256 a373838fbf2ae92a…

MALICIOUS

PDF

46.3 KB Created: 2021-06-09 14:37:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6a81ff558fbe9c9f334d8b9cc072404b SHA-1: d82e26412b20ab008d9ce3f794689168af11f30d SHA-256: a373838fbf2ae92ae7d0204a34cd1378752d6718d6483e8731e65bbd86219af0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising game hacks and generators. The ML classifier also flagged the document as malicious. While no scripts were extracted, the presence of malicious redirector links strongly suggests an attempt to lure users to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/hacked-noob-roblox-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-roblox-avatar-clothes_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-btools-hack-2021-october_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/robux-hack-no-human-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-working_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_off00005436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5436 27400 bytes
SHA-256: bb0c0c6a9e438eb95e5b8b8b990af959b4e8bc784b883e24e66991a683d051a8
font_01_sfnt_off00009213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9213 18356 bytes
SHA-256: ccc887bd34092095e9a5c81f60799945b7b7435f06b079f44fbba9730e4b32be

Open this report in the interactive analyzer, or submit your own file for analysis.