Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6f6ebf74fdae56…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 20:54:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e7f45dc9c3fdbc216720d79ebdd32e33 SHA-1: ea3b504db11f00054fbae8b972bdd81fb0348e98 SHA-256: 3a6f6ebf74fdae56734cf2bc50688d6c2590bf7b734d1ef176e2b808f69cc11f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent link to a 'free generator / game hack' lure, strongly suggesting a social engineering attempt to redirect users to a malicious site. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the presence of external URIs and the game hack lure indicates a likely attempt to download a second-stage payload or lead the user to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • 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.
  • 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/how-to-get-free-spins-on-coin-master-ios-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/pokemon-go-free-promo-codes-2021_GM1094591345.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/spin-link_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/real-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-roblox-vip-sign-ups_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/pubg-uc-sale_GM1330123889.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/tiradas-coin-master_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_004_off000054a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54A1 25120 bytes
SHA-256: 62c4b5d33565800f6bf6740bf9d8f52ae1bf7530195b75bf1b0cc74163ec52fb
font_01_sfnt_off00008de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE1 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9794 18052 bytes
SHA-256: 751b5bf5e2baa224d49100cdcfdcfacb8a421785831d1efd4091db32238aca98

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