Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ad9c001a78b9c2…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 11:53:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f7767b85d8435fd30525631e18282dc9 SHA-1: f1dbbce9d6f5a5133696e6859d14bf950360d23c SHA-256: e5ad9c001a78b9c2a6a439e6a49881a62dabe7de50a227458efb1b9367b6b808
160 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a game hack lure, linking to a known malicious redirector. The document body explicitly mentions 'Best Hack For Coin Master 2021' and provides the malicious URL, indicating a social engineering attempt to trick users into visiting a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

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/406889139/best-hack-for-coin-master-2021-game-hack In PDF document text
    • http://opac.salatiga.go.id/slims7/repository/pubg-uc-100-bonus_GM1330123889.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/instalation-cheat-strucid-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-get-free-bc-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-chp-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-codes-2021-mai_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/robux-free-pw_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-vehicle-simulator-money-hack-download-script_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/admin-commands-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-roblox-gif-card-codes_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-make-anything-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/robux-scam_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/combo-free-roblox-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/get-free-robux-today-no-human-verification_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
stream_002_off000031ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31EC 23000 bytes
SHA-256: fba1797b52cf02bbcea618f56bcb39dc4f748de6311700891a87d1f0a3dd8b89
font_01_sfnt_off00006514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6514 18788 bytes
SHA-256: dc3f4d4e0a9d60eb4de95a00226aa383eb4bd515295677fa5f3c2ae0598a40d1

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