Malicious PDF — malware analysis report

Static analysis result for SHA-256 161a818e7f741e34…

MALICIOUS

PDF

41.1 KB Created: 2021-05-19 06:35:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1503a1b67849e6386ede00dd993af65a SHA-1: 02ab1077f5b37f7e4cc97884592561b15f2aeadd SHA-256: 161a818e7f741e340fee56040cd1bf53fff0332621d6e6bec4fc115264e001b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "game hacks" and "free generators" for popular games. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-pro-gamers-game-hack, which is designed to lead users to further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive traffic to potentially harmful sites, likely as part of a phishing or scam campaign.

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/coin-master-hack-pro-gamers-game-hack In PDF document text
    • https://www.ak-oroslavje.hr/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-online_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-images_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-executor-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-exe_GM431946152.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_off000047aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47AA 24520 bytes
SHA-256: 5b1241fd29bcd782dc474f39c6dbffef8d4adb102065bbd47bce274b61cab753
font_01_sfnt_off00007ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED0 18132 bytes
SHA-256: 7c3ba000fcc9e82367a9cf09e7428e48624a936725f215f3086fe1b405a0b7f2

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