Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1f8407591033e4…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 14:36:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 68e9ae53bb96288b0665a1cfb7f6c54a SHA-1: f0d3d80299a40c5d8d59ed9c6332e925ba9a9b54 SHA-256: 0a1f8407591033e4e13ccbfc66cd6cdf6df418b65f106dcd4f22cdc5ac006d5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The ML classifier also strongly indicated maliciousness. The primary lure appears to be a fake offer for game-related cheats, designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/haktuts-coin-master-free-daily-spins-game-hack In PDF document text
    • http://razredna-nastava.net/files/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-youthnow_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_003_off00004709.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4709 26088 bytes
SHA-256: 723e025908fbf0c2ca9519aef8d3b629076a6b8e5425bab8d378213c15bb51ce
font_01_sfnt_off0000831c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831C 18620 bytes
SHA-256: ded7de44f7a870837d4ef416985ae0b9ef78dce3540f45b1558d033e63b05ca7

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