Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04675c21f6f7b70…

MALICIOUS

PDF

44.1 KB Created: 2021-06-07 14:22:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 67f9397f204ed3b8aaeeba78b99957f2 SHA-1: 5da2245270b1bd5fc44ce069408d2c1eecf148d1 SHA-256: d04675c21f6f7b702d038d3f28896d4987a9dee01e72c31a2715ee375676d50d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary link, https://netcdn.tw/app/431946152/cheat-roblox-kick-players-game-hack, is presented as a 'free generator / game hack'. The document body, though partially corrupted, contains references to this lure and the tool used to generate the PDF. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/cheat-roblox-kick-players-game-hack In PDF document text
    • http://apostolosandreaslemesou.com/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/pokemon-go-free-walk_GM1094591345.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/pubg-uc-shop_GM1330123889.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-daily-spin-free_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
stream_004_off00004fa1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FA1 24832 bytes
SHA-256: 7fff41af5f906a004202bf3a13ed825a61c25e24abdcbf0658296cf2e0a25f28
font_01_sfnt_off00008803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8803 18904 bytes
SHA-256: 0ad4aa21292e99cc9e687db61b0730080e45d0a999924f21103e8f5819ff9553

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