Malicious PDF — malware analysis report

Static analysis result for SHA-256 8265304501bbd07f…

MALICIOUS

PDF

32.5 KB Created: 2021-07-20 07:50:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3e664616b15e767488eef2e50a811e1e SHA-1: 54c650814464e850e5b45c0f8f6aca2e1b139c5d SHA-256: 8265304501bbd07fb5002d453c11a3092caeebc7d6f3449d11c4676c7bd94242
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The heuristic firings indicate that the document is designed as a lure to trick users into visiting these malicious sites. While no scripts were explicitly extracted, the nature of the embedded links and the lure suggests a potential for further malicious activity, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/how-to-hack-roblox-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-minecraft-skins_GM479516143.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_off0000299a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x299A 22528 bytes
SHA-256: e1d15474ca9430be38691f3b37d33648d8ab094609c63e99a97042f020f59f87
font_01_sfnt_off00005bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF3 18532 bytes
SHA-256: e43404e6210dd1b6db886e02177179806245dbc9d668ada1920a62956b1e0403

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