Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb1a542e1ca1f6f…

MALICIOUS

PDF

44.3 KB Created: 2021-06-11 11:48:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11ecc5a324263ca63a85bfebfefaab58 SHA-1: 5fda7a32cb501e135e25f466a49208a14824bee0 SHA-256: adb1a542e1ca1f6fdb81c05f671210dc3e9f280a712c34cdfdd12414da146c75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, specifically advertising 'Roblox hacks' and 'free Robux'. The document body and heuristic firings confirm the intent to lure users to external sites for potentially malicious downloads. No scripts were extracted, but the embedded links and redirector activity are strong indicators of a phishing or malware distribution attempt.

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/roblox-hack-download-android-2021-game-hack In PDF document text
    • http://zarinnameh.ir/images/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-btools-hack-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/high-jump-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-cheat-booga-booga_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-2021-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-builders-club-free-trial_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/get-anything-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/is-minecraft-java-edition-free_GM479516143.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_off00004d19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D19 25448 bytes
SHA-256: f11d5c3cec992104f2c221b967aa18b823b097af49bde7f28aa09367cebd2115
font_01_sfnt_off0000878e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878E 19208 bytes
SHA-256: 3b753ae5ba17378d123b651bf36897347834fd896549650ac82edcbb8caa6ae1

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