Malicious PDF — malware analysis report

Static analysis result for SHA-256 f653a493f287ab73…

MALICIOUS

PDF

33.3 KB Created: 2021-06-25 18:35:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1473037d2b91e06862483944a08bf212 SHA-1: 3040ea87e7d81fba61455d8aba977813fe105033 SHA-256: f653a493f287ab73556bf8906e16d89a8343e9a5bdbb5c5bf6c8b4c24b832c68
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game-related hacks and generators. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the heuristic firings indicate a clear intent to redirect users to potentially harmful content, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/pastebin-roblox-free-catalog-game-hack In PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-roblox-bucks_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/3-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/robux-survey_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/pubg-uc-buy_GM1330123889.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/daily-spin_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/android-oyun-club-roblox-hack_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-sexually-abused_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_off00002d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D73 21760 bytes
SHA-256: a5fb2b79a8a73d9ed1e6e45562f562911fac0ce534f8eb53c34bebb4e6aeeb61
font_01_sfnt_off00005d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D53 19028 bytes
SHA-256: a35916f07601e2cbc98ff89fff05853187622c69d143f9ef0de219a1bd6b6a39

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