Malicious PDF — malware analysis report

Static analysis result for SHA-256 404e56f088278a5c…

MALICIOUS

PDF

56.0 KB Created: 2021-06-03 08:58:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5c659d7b57a08de351553f0e9b134dcf SHA-1: 7de29286a8c2663d1a7cfb3a53cccede92e06e1a SHA-256: 404e56f088278a5cb41b91819bf1e78a7e9ec41099ba7238998ff5b6287d38ec
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure for a 'free generator / game hack' which redirects to a malicious URL. The document body, though heavily obfuscated, contains references to this lure and a download call-to-action. The presence of a password-protected archive lure suggests the downloaded payload is likely encrypted to evade initial security checks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9373

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/minecraft-java-edition-for-free-game-hack In PDF document text
    • http://library.stikessuakainsan.ac.id//repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-tiktok-email-and-password_GM835599320.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000056ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56AD 25480 bytes
SHA-256: d16f9de595103cc8a7c873644da1608dc8897022bd7c6a1434666928531935cf
font_01_sfnt_off000090ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90EE 7936 bytes
SHA-256: 038829bc81e15b6024d2a75b24b2b95e916dd2d8797e4f87b867de59d61698ef
font_02_sfnt_off0000aa18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA18 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000b8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A4 18164 bytes
SHA-256: e28d0ded599416f75746d42b4ddd49ac4ed584cd54835945167b34c6d366202b

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