Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d38036c23770d05…

MALICIOUS

PDF

41.8 KB Created: 2021-05-10 23:32:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a47e461a517e3fa87d64ed0b1effd171 SHA-1: 7d7e17f3157bd051cd412ca365281f3f1e3c060a SHA-256: 8d38036c23770d05e77ccd40a980bf4dceb12fbc9b79dca37af040d60f326177
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on offers for free game currency or hacks. These links redirect to malicious infrastructure, indicating a phishing or scam attempt. The document body and embedded URLs strongly suggest a social engineering pretext related to popular online games.

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/free-spins-on-coin-master-2021-game-hack In PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/roblox-online-free-no-download_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_off0000498b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498B 24416 bytes
SHA-256: 97afbfaaa97990e1972945d61e12b370fdff59bef1b341f121d265dd9b03f34b
font_01_sfnt_off000080e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E1 18288 bytes
SHA-256: e7fc04cebd192de8ea685c8f65a9790caba4d729d1f53b0455241ee170bde56f

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