Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3dc7108cc2cd7bf…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 23:45:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 684e794828d052ff02f04f44fe5cb22d SHA-1: 9b1571062274a471c17bdd0880b2b0412e44fa7d SHA-256: d3dc7108cc2cd7bf2fa417920bdb17aaf920a40197fa5d78c3db884ac47622d8
82 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to 'netcdn.tw', that promise game hacks and free spins, a common lure for phishing or malware distribution. The ML classifier also strongly indicated maliciousness. The document body and extracted URLs suggest the primary goal is to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-heaven-links-free-spins-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robux-gift-card-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/god-mode-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-message_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-weight-lifting-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/youtube-how-to-get-free-robux-seniak_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/get-free-robux-codes-now_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.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_off00003321.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3321 23440 bytes
SHA-256: 995ac540d313653e2c13b9fbeebdd54a4b7393e4dc135c2245afe7c6e9306720
font_01_sfnt_off00006806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6806 18460 bytes
SHA-256: 7f2262db6ab76bc1f6105e798ed7c50fa72da46386f32024f49953bbee5214b2

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