Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1fbee8e5979966d…

MALICIOUS

PDF

44.7 KB Created: 2021-06-08 12:39:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ab5d4085f54782fa45df2328f586eef8 SHA-1: 6c688f9929a615abd0e327cfcf1a53110d05e47a SHA-256: b1fbee8e5979966df2674ca0f2f15fb0a7360e9dd8aa00a1a0f0c4fad05ae956
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector link to a 'free generator / game hack' lure, specifically pointing to a URL that promises free Roblox login details. This indicates a phishing or scam attempt designed to trick users into visiting a malicious site. The document body, though partially corrupted, contains similar URLs and text related to game hacks, reinforcing the lure.

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/free-roblox-login-password-game-hack In PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/roblox-was-hacked_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/earn-robux_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/roblox-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
stream_004_off00004f81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F81 25272 bytes
SHA-256: 8cca50ee962f10a0bf4dfac4aaa44b26b38372d324053cfcce1e661647dac0b4
font_01_sfnt_off000089ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AC 19076 bytes
SHA-256: b476eb0578b9ab22fb1c44a25136b31f435ea13ba3ef0e80fd4918aba6b4290b

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