Malicious PDF — malware analysis report

Static analysis result for SHA-256 a551521818a2c986…

MALICIOUS

PDF

34.5 KB Created: 2021-07-01 02:14:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d492022daf00f2255810d6575030b304 SHA-1: 9e06d0adc10882bf9b4a0f6452deeb73892ea1aa SHA-256: a551521818a2c98654e85bb50e98ce9b49d08141c4b834702cb947e014c047ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure is the URL http://netcdn.co/app/431946152/how-to-get-free-robux-no-virus-game-hack, which is flagged as a malicious redirector. The document's content and embedded links strongly suggest a phishing or malware distribution attempt, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-robux-no-virus-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/saber-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-com-hack-account_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-ultimate-gamer-365_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-minecraft-java-free_GM479516143.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
font_00_sfnt_off00002f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F63 22440 bytes
SHA-256: 51ef877df00f4e095282b69fdf0db5f192ac214a2d3c5fdd18700cd73a122cd5
font_01_sfnt_off0000614b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 19240 bytes
SHA-256: eae46e8dd7fdaf7f29bd396552dc7db19d74147ff83c415e165f0b463cf0ae32

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