Malicious PDF — malware analysis report

Static analysis result for SHA-256 386d59c2004af8d8…

MALICIOUS

PDF

46.4 KB Created: 2021-05-14 13:39:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f20f8855dfdc82c648d4865da0687a7e SHA-1: e1ab7ba90ebe554ae0b85b1d340fb3c82e528b80 SHA-256: 386d59c2004af8d85144e65e41096ada21efbd220a39ab45c86eb775a72f3c71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a lure related to free game currency (e.g., 'Roebucks' for Roblox), indicating a phishing or scam attempt. The presence of embedded URLs and the nature of the lure strongly suggest the document is designed to lead users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/431946152/how-to-get-free-roebucks-on-roblox-game-hack In PDF document text
    • http://gazelletr.com/userfiles/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/i-want-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-roblox_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004942.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4942 27196 bytes
SHA-256: 0cbf6cc6794001c07f7e37c288204716fb313b2734683278b32c514ae525839e
font_01_sfnt_off0000877c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877C 3112 bytes
SHA-256: 471f662098e83c5562504503f5e7603b336ca0957605358090bb98e15c7aed80
font_02_sfnt_off00009236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9236 18524 bytes
SHA-256: b7643ab87c6ede69648f322cd81a197be2475f7126f117e622ee98ccb7431d7c

Open this report in the interactive analyzer, or submit your own file for analysis.