Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57f807ef62ea786…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 12:44:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: fea7676d46660282f7c5b4d95715fa95 SHA-1: fa5721bf8e644b3810b8ec843d2e5d1e01a09a10 SHA-256: e57f807ef62ea7864b30e9555ee2c5921778d8505a69d265de302e58487e7d55
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures for Robux. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/how-do-you-get-free-robux-without-doing-anything-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id//repository/more-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/corn-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/roblox-devil_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/app-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-coins-and-spins-daily-summary_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_off00004e26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E26 25196 bytes
SHA-256: e7b861fb865fc466a232b1b750eeb63d39ebdb366878a7c1979e65ef57246159
font_01_sfnt_off00008882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8882 19564 bytes
SHA-256: f288fbb1ab92d6f8be6652009a81e99b9e02fb437604b8cefd24a0b2528ef73f

Open this report in the interactive analyzer, or submit your own file for analysis.