Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8226a7cc974436a…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 00:45:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f057235c79bd290f0e9cace92c30736b SHA-1: cbd71792709a2a844dac9c12a8532c70a2cff992 SHA-256: a8226a7cc974436a41c0e685b0117f82b011c1aa8130061457249790a8bf9a4b
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 spins'. The primary malicious URL identified is http://netcdn.tw/app/406889139/google-coin-master-free-spins-game-hack. The document body and embedded links suggest a lure for users seeking in-game advantages, which is a common social engineering tactic. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/406889139/google-coin-master-free-spins-game-hack In PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-code-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-giver-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/download-roblox-jailbreak-money-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-hack-download-pc-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/cheat-pour-la-money-dans-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/i-want-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/pubg-uc-770_GM1330123889.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-you-get-free-food-on-coin-master_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_002_off0000302c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x302C 23076 bytes
SHA-256: 6210dcd876b4931a08e7340e1bf4b851db510ae2e8bf96f3536604f0610b5ecf
font_01_sfnt_off0000640d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640D 18248 bytes
SHA-256: 030bed7090460e4d71b0ce795308f81d11b161da8a2958b6b82163bc1faa59de

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