Malicious PDF — malware analysis report

Static analysis result for SHA-256 309545b63b714677…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 22:42:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4fa61beac0c84e74c5e733d8de5f1a37 SHA-1: f07f25cdf32158d5a03ca454baa19464d38ed42c SHA-256: 309545b63b714677bea5b202f13d096433bab7f7dd43f98f75aacf413c5db38f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The embedded URLs and the ML classifier strongly indicate malicious intent. The document body, though partially garbled, contains references to game hacks and URLs, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • 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.
  • 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/431946152/robuxglobalcom-no-verification-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/pokemon-go-free-evolution-trade_GM1094591345.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/script-for-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/pubg-uc-at-cheap-price_GM1330123889.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-iphone-2021_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_004_off0000508c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x508C 27980 bytes
SHA-256: e515dfc02959132028c5a8daea0d99df393b7a2f5e94cdcef0fdd0cc3220ff24
font_01_sfnt_off000091be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91BE 19056 bytes
SHA-256: 604842a08189fbdc46a09d68ab1d8addf33948d26a5d5cdcd7cf8fa5ff42efeb

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