Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b27f6157898f2d…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 08:59:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: caacc3d0e64f0d34dc62a443f3c2ad69 SHA-1: c7d33de5a199d29a6956a9bc3077313260af3f3c SHA-256: 61b27f6157898f2d48deb2152a04d985dbc4a3259fc334d9d8a88c8c1d2dbc47
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and currency, identified as malicious redirectors. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary attack pattern involves tricking users into visiting these sites, which likely serve as a gateway to malware downloads or further malicious content.

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/431946152/roblox-hacks-2021-game-hack In PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-a-free-invisible-head-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-college-textbooks-tiktok_GM835599320.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_off0000312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312D 22264 bytes
SHA-256: 3a85fc387f5a812bab2b18060a8216f121b5ef79ef7871684de4175ca482d5e7
font_01_sfnt_off00006230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6230 19056 bytes
SHA-256: a827687bde1c23907f75db23928d8c544c1849638492c2c48bf6e5fa6ea38882

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