Malicious PDF — malware analysis report

Static analysis result for SHA-256 536e098fafc83fae…

MALICIOUS

PDF

44.1 KB Created: 2021-06-11 04:36:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6a40101496fe4072282be25af705221f SHA-1: efe1920320d92e5525c9434cdc0336e195d8ccc3 SHA-256: 536e098fafc83fae57cf32a814ddc6e09915779deda8ad25f9f2432ef17ce484
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'free currency'. The primary lure URL is https://netcdn.tw/app/431946152/how-to-hack-someones-robux-game-hack, which is associated with known malicious redirectors. The document's content and structure strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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.tw/app/431946152/how-to-hack-someones-robux-game-hack In PDF document text
    • http://zagi.hr/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/village-4-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/pokemon-go-basic-vs-premium-rewards_GM1094591345.pdfIn PDF document text
    • https://www.zagi.hr/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-group_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/flame-gg-free-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
font_00_sfnt_off00005183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5183 24168 bytes
SHA-256: e61e0c24c8286423c16dd589f40d176c7702e1e799da8443af6379301f4efbb0
font_01_sfnt_off00008889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8889 18672 bytes
SHA-256: a063730b3eb42df10160e577d2a78b917c6941b1e2d3d88bad47606a964f8823

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