Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3540bbe1fc65be3…

MALICIOUS

PDF

33.5 KB Created: 2021-06-28 04:53:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ba7f28e0c5d82baf7f30535b19cea5e4 SHA-1: b582a75f60a45812a5e23ff89d1ecbbca6bf4601 SHA-256: f3540bbe1fc65be3a0a9082b5ad80e41ab049291c7664c8650a4ed5a6955f082
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and free currency for popular games. The heuristic firings indicate that the PDF is designed to lure users into clicking these links, which likely leads to further malicious content or downloads. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a phishing or scam attempt.

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/roblox-sun-drag-hack-game-hack In PDF document text
    • http://empresa-venta.hr/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-roblox-promo-codes-2021-may-14_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-cheats-codes-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-free-bc-v3rm_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/welcome-to-roblox-account-hacker_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_off00002dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFB 21776 bytes
SHA-256: 868bf22bec201f1ce9091a7ebbb1241930031b4b99207f8f87dd74b093269de3
font_01_sfnt_off00005de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE0 18964 bytes
SHA-256: d7b1b7b486ea81f96dd80771ab36b4ba58f257dece61dd1838c8e995302a03df

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