Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ac42e26e68b5d3…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 14:01:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 33e8f6465575b84335f71ece7626e660 SHA-1: dfd84caaa263c78b138b3753fa9af194b10cf711 SHA-256: e8ac42e26e68b5d3107d7ac7302775595a35a947e518eecb4862216175187c2d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising free game hacks and generators. The primary redirector URL is http://netcdn.tw/app/479516143/free-minecraft-thumbnails-game-hack, which likely serves as a gateway to further malicious content or downloads. The presence of a visual download button lure and the ML classifier's high confidence score further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/479516143/free-minecraft-thumbnails-game-hack In PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-a-2021-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/infinite-jump-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/mc-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hack-march-18_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-ohne-handynummer-und-menschliche-ver_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-generator-with-roblox-quiz_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/binextreme-free-robux-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-can-you-get-free-robux_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_off00003228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3228 22692 bytes
SHA-256: 4ccd292ca70be068c91e47d3ef3e1c071f1f72163304097e6544bc1752a7977a
font_01_sfnt_off0000645c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645C 18652 bytes
SHA-256: 8cb94b06f77e1baa2d49adc168d2190632a611d700f1536995b593d613ae9b0b