Malicious PDF — malware analysis report

Static analysis result for SHA-256 53949cad95e41863…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 05:03:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3c73a054024c5c8b2b8d25d9c30222c2 SHA-1: 90b1cfe452d278036d79b8b38e9b53ef7c49e49e SHA-256: 53949cad95e418637b6cbaace737b8a81e8f904084543ee6cc778b980e4b0f09
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that promise game hacks and free currency, such as 'Coin Master Hacks 2021'. One of the primary links, https://netcdn.online/app/406889139/coin-master-hacks-2021-game-hack, is flagged as a malicious redirector. The document body and embedded links suggest a social engineering lure to drive users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-hacks-2021-game-hack In PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/pokemon-go-free-accounts-2021_GM1094591345.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-spins-coin-master-2021-glitch_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_004_off00004dce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DCE 25620 bytes
SHA-256: def2ea15ae437a9a7ddef72920950c7b391274082d0a4779c149f172fe9e80b0
font_01_sfnt_off00008818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8818 18116 bytes
SHA-256: 17974cef81917e5ef69542194afa433aff210173cc902887fbc2b56a9328dd03

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