Malicious PDF — malware analysis report

Static analysis result for SHA-256 597f6c96b1722161…

MALICIOUS

PDF

44.0 KB Created: 2021-06-11 01:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b8d1dcda14ba44639e638d8f847c5220 SHA-1: 66c42b7e7a7ba1867ec3fd18c369ef5705d38dbf SHA-256: 597f6c96b172216159f6553cd14040dad7875a183e3195a3a8bea2dd52e410a2
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on domains that appear to be part of a link farm designed to attract users searching for game hacks and free currency. The primary lure is for 'Roblox Free Robux Free Hack', directing users to a URL on netcdn.tw. The presence of a large number of linked PDFs suggests a coordinated effort to distribute malicious content or drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/roblox-free-robux-free-hack-game-hack PDF link annotation
    • http://halitbayramoglu.com.tr/images/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-robux-hack-app_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/get-free-roblox-and-put-on-your-roblox_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/super-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-robux-hack-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/flameggco-free-robux_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-free-robux-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/cheats-for-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/pokemon-go-free-versus-pc_GM1094591345.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-roblox-gift-card-no-survey_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-free-roblox-robux-codes_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005005.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5005 24572 bytes
SHA-256: cc847701bef2d4d201c6ce45bdbefb2e7207b84790f06bdca6121e1ea1a1f353
font_01_sfnt_off000088a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A6 18488 bytes
SHA-256: 44072fbb5c45a7604268a2c6438126b7db3492802a9c8847ecb07522db400813

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