Malicious PDF — malware analysis report

Static analysis result for SHA-256 81271300fd911773…

MALICIOUS

PDF

42.1 KB Created: 2021-05-17 03:05:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b7de5fd081a5235fce45b6797ebbb518 SHA-1: 29ba3ffbe4602a6ee480908e7ed07d517c77a59b SHA-256: 81271300fd911773719702fbc2d0cc73bf101db5e867e72ddabfe98d91d5dad8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting 'free Robux' and 'game hacks'. The document body, though partially corrupted, also contains similar lures. These links likely serve as a lure to download further malicious content or to phish user credentials. No scripts were extracted, but the presence of malicious links and the lure-based content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-promo-codes-game-hack In PDF document text
    • https://sitam.co.in/images/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/free-robux-now_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/free-coin_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://sitam.co.in/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://sitam.co.in/images/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/claim-roblox_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/coin-master-apk_GM406889139.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_off0000479a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x479A 25664 bytes
SHA-256: f3b430ec16434e0182c398db45ea99a2c1901107dc43115633c9ea887226de05
font_01_sfnt_off00008172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8172 18604 bytes
SHA-256: 81df952e11a915931eb8909d89f5eda5fa0aae9cee1bf8eea3735c5794fb3fb4

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