Malicious PDF — malware analysis report

Static analysis result for SHA-256 e973db71bb13e631…

MALICIOUS

PDF

46.5 KB Created: 2021-06-11 07:58:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0ee198c41a75f1a9258e2023b59a6ed0 SHA-1: 3db15affeacb24b2316d164be407f12e30f1410b SHA-256: e973db71bb13e63108ff249f37762152c400da6fcaa69f86d31c6b719d62c4c9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious redirector chain designed to lure users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/cheats-for-the-plaza-roblox-game-hack In PDF document text
    • http://korporacjaroma.pl/images/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-anti-afk-hack_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://korporacjaroma.pl/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-roblox-promo-codes-june-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/mcpe-client_GM479516143.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-cheat-engine-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004dcd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DCD 24176 bytes
SHA-256: 2c9c59e5634f68fa59e1553c271199dd23a1dd78db835e1be13818a583ccd1a5
font_01_sfnt_off00008500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8500 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off000091a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A8 18684 bytes
SHA-256: fd4dbd8c09123890f833a983abd17d838529b8d4b06242da6db1686c2eaf885d

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