Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e82235fc810ccfb…

MALICIOUS

PDF

58.9 KB Created: 2021-06-03 19:53:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5a6309765b5331900c1320e6a0365d26 SHA-1: 9dcd208223011875de3d6b971274082cac7a6260 SHA-256: 1e82235fc810ccfb95c188f2300fd39e34e2f7474089b1f0b8a6c7da74d00585
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to sites offering 'game hacks' or 'free spins', a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure itself facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9504

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/10-free-spins-coin-master-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pubg-uc-gift-card-free_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hacker-finder-roblox-id_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/lin-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54CE 26796 bytes
SHA-256: 89b82a31664b3fa39b759014d0944cd1c56fb7d5672c4e8d9c6988e6bb3b0d5d
font_01_sfnt_off00009381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9381 3088 bytes
SHA-256: 21947db80f63681192ff4d23c9293372afcdd8455d0079c5ca62ec2c2320d79e
font_02_sfnt_off00009e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4C 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000b171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB171 19492 bytes
SHA-256: b10d7d9036684a6efa479ded4b2a481bb1dca2105736cbd04df7c7d73cb07c40
font_04_sfnt_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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