Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a43b560ee271de…

MALICIOUS

PDF

37.4 KB Created: 2021-05-20 23:17:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: be83b7a51ee9f13d2d7107743fa6eb29 SHA-1: 191b1061e812998542c6b42c4365bb5d2f7d1d42 SHA-256: 57a43b560ee271de4fefff893a25bc15ce36f042dde3980a5622e3b8914f8732
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering 'free generators' or 'hacks' for popular games, a common lure for phishing or malware distribution. The document body explicitly mentions 'Free Roblox Gift Card Codes' and includes a call to action to access a generator. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/free-roblox-gift-card-codes-game-hack PDF link annotation
    • http://artion.biz/images/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/coin-master-daily-free-spin-app_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_off000033ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33AE 25928 bytes
SHA-256: 9be929826f2c4f0c673612c5d469b01493b081494b6212041ec5f0d06e716925
font_01_sfnt_off00006ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFC 18572 bytes
SHA-256: ffbc77db5113ad0b7fd344ce16d81dafdbf0c64cd7df39142b32362cc1b263a9

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