Malicious PDF — malware analysis report

Static analysis result for SHA-256 6378e00219d60994…

MALICIOUS

PDF

44.5 KB Created: 2021-06-09 03:32:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ab9c1979a52682e83a7230173bccff4d SHA-1: ffcd93d8cc902cf223004cd003d13bb99b7c0892 SHA-256: 6378e00219d60994922d5f7827a46572b5fcddbcc8641734f3d07e72c866f40f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is https://netcdn.tw/app/431946152/speed-script-roblox-hack-game-hack, which likely leads to the download of a second-stage payload. The document body, though heavily obfuscated, contains references to this URL and other similar PDF files hosted on a school repository, suggesting a broad phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/speed-script-roblox-hack-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pubg-uc-olx_GM1330123889.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/redline-hack-download-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-link-app_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
font_00_sfnt_off000050bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50BC 25180 bytes
SHA-256: 5086c01a44ad4082596e08db617a2d7288af7920c612e60cb8e3e86361569d5a
font_01_sfnt_off000089e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E7 18756 bytes
SHA-256: 92b434c72c8e0142abbca6a5fadf2044fe11e8317479bfcdc5ddec9b006bee63

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