Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d1da5a28a5e8bc…

MALICIOUS

PDF

56.3 KB Created: 2021-06-03 13:55:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 94132a4ce6d416baa74a1464a53d6e75 SHA-1: 982269ecd834e093e5852b1cb33c42cb4b657650 SHA-256: e6d1da5a28a5e8bc6601b49c769f366c1fd5930ad555c57ed3887f3fe94fe06b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free generators. The primary lure is a 'Coin Master Hacks For Android' theme, designed to trick users into clicking the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9650

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/406889139/coin-master-hacks-for-android-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-to-village-3-in-coin-master_GM406889139.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_off00005016.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5016 26488 bytes
SHA-256: af1680b695e800f81749cd2fa64d39a2108a9b5c37782d3d960c2fce06b83391
font_01_sfnt_off00008d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D76 3088 bytes
SHA-256: 21947db80f63681192ff4d23c9293372afcdd8455d0079c5ca62ec2c2320d79e
font_02_sfnt_off00009841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9841 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000ab67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB67 18056 bytes
SHA-256: 59174fbff90841f3d82b951a67024dd49c53f2706d138598019600dd1f76f1a3
font_04_sfnt_off0000cca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA6 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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