Malicious PDF — malware analysis report

Static analysis result for SHA-256 1caaf20756439a1e…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 14:18:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3b2f1a9a751c2cd033e2c944f83aaea0 SHA-1: 8970b8b4fd44e5c3a313b4534e99c004281129ce SHA-256: 1caaf20756439a1ebed275672aeddf2fd0944519a6b10a409257620ff53ad995
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/479516143/free-minecraft-printables-food-labels-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-college-textbooks-tiktok_GM835599320.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_off000055c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55C1 26036 bytes
SHA-256: 7566712bf828fa23cd30f4a87079dc08a74085ccf55d03fad83cc1edd832b0f2
font_01_sfnt_off00009167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9167 2892 bytes
SHA-256: e0a0e7499c3dd10c5114bd1538d6e258e6cb3acdd4f79d9538668087a4bdd2cc
font_02_sfnt_off00009b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B50 18272 bytes
SHA-256: f2c529c176ea6290bd871c2fd1a1a72e1d93e196016b8d790adf98aeb938da6a

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