Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e56bb33ef75fdd…

MALICIOUS

PDF

45.0 KB Created: 2021-05-11 13:08:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2d7df152c422a3a5f3e40f3d2dde70d4 SHA-1: 127be9a7a29adaa4e462d177bb71e6510c4b614b SHA-256: 23e56bb33ef75fdd60c40867f9eb578da458e9467a859601621be012152a0010
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The document body and heuristics indicate a clear intent to trick users into visiting these malicious URLs, likely as a phishing or scam attempt. No scripts were extracted, but the presence of multiple malicious redirector links and the ML classification strongly suggest a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/free-coin-master-gifts-game-hack In PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/mcpe-116_GM479516143.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B32 25516 bytes
SHA-256: 71cabdaeb6540875d1e82911a57b5622c6c2c85c9b2ba3ab3b59667dcbd7081a
font_01_sfnt_off0000858b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858B 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3D 17712 bytes
SHA-256: a02a8482596092bbe2b4efe270951b6f574c255f03fc3b97eeb87af209467e86

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