Malicious PDF — malware analysis report

Static analysis result for SHA-256 180165aa4f3b0a8f…

MALICIOUS

PDF

33.0 KB Created: 2021-07-09 06:31:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d5ff72c10c4b2e71df7ce022d454b748 SHA-1: 7a3c8300accaf9f1d323240712901eb84fa8e4b5 SHA-256: 180165aa4f3b0a8fc7ec151656b2e2ac53bad95e4f3dd176191f37be906c3cda
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a critical heuristic firing for a malicious redirector link, specifically targeting users with lures for game hacks and free currency. The embedded URL 'http://netcdn.tw/app/431946152/watch-ads-for-robux-game-hack' is identified as malicious infrastructure. The document body and numerous other URLs reinforce this theme of offering illegitimate in-game advantages, suggesting a phishing or scam attempt designed to lead users to potentially harmful sites.

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.tw/app/431946152/watch-ads-for-robux-game-hack In PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-free-robux-without-downloading-stuff_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/grab-points-login_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/www-coinmaster_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-how-to-get-free-gamepasses-2021_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
font_00_sfnt_off00002db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB6 20840 bytes
SHA-256: b2d1d0252a411efe0fa0fc361a223357df0b34072230d9822c99d595e2b30eb1
font_01_sfnt_off00005abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABC 19360 bytes
SHA-256: 3afd0598bb5a5ad237ecb392e60babe63cf66cf5547cf504e55ce532e2e57b01

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