Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace7c9ae708e10dd…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 04:59:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b9063b4a7e0ade764452b585cdcda57b SHA-1: aa87164aabb3f3eb9cb19673a7c886f1a72907fe SHA-256: ace7c9ae708e10ddcf8511a703666bb5520d3edf7380b8d15fb31e696f1ae3a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body, though heavily obfuscated, contains references to the same URL and appears to be a lure for free game currency. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/406889139/coin-master-card-hack-2021-game-hack In PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E09 25336 bytes
SHA-256: 5546033683895a8841e001a9a410af5c67956ecefdba78fe979ad621c75b878f
font_01_sfnt_off000088da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DA 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000928b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928B 18292 bytes
SHA-256: 56ed892f9c960ec28c91726eeb440a92294fcef820bc23b96874e10d7a9d3574

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