Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d710b71be72a593…

MALICIOUS

PDF

43.7 KB Created: 2021-05-20 01:39:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7268aef297401934a994530dc753f8fb SHA-1: 526b75c11e02e1a31bcd1279172ddbd9ef119b25 SHA-256: 5d710b71be72a5931c7e68e9f86499fb922fbb99778a3d9d1bd81e9d7f2b9732
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The document body, though heavily obfuscated, contains text related to 'free Robux' and a URL that aligns with this lure. The presence of embedded URLs and the ML classifier's high confidence suggest malicious intent, likely to redirect users to a site that may host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/lazy-blocks-com-free-robux-game-hack PDF link annotation
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/wurst-112_GM479516143.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/offers-for-robux_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_off00004c52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C52 25768 bytes
SHA-256: cd0f778d9fd919664d64966dec91e0f50fda330a6751f7b55ab94fd2147f9b7d
font_01_sfnt_off00008661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8661 19008 bytes
SHA-256: 34c8d34d38b90765c6e33941713304debcf78082891e10a16d595afa5c3321d4

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