Malicious PDF — malware analysis report

Static analysis result for SHA-256 73aae80cba4e29a3…

MALICIOUS

PDF

34.8 KB Created: 2021-07-01 13:26:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 103ea4511d120a507d099c20154e2d2d SHA-1: c64d310626780bd863d320553130a094c07fdf15 SHA-256: 73aae80cba4e29a38b799872934ec446da3a84cb139c4fa66e5d2e9269ecfcf4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free Robux or game hacks. The document body and embedded links strongly suggest a phishing or scam lure designed to entice users to click through to potentially malicious websites. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-money-hack-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-medieval-warfare-reforged-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-in-roblox-and-get-path_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-hack-generator-club-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/simplysarc_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-troll-players-inject-script-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/apk-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/boku-no-roblox-remastered-hack-script-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/rosenberg-roblox-hack-pain-access_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-pe-hacks-2021_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
font_00_sfnt_off000031b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B9 22044 bytes
SHA-256: 1aeffe2791b007ff6601a2ec2109c7c5d3fbb96efe388d21265018e10ad91d7f
font_01_sfnt_off0000625b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 19260 bytes
SHA-256: f28076f54dd9e5fda14f5ea96d5f5c99c60221d719a0857bc6aac8c059e0d139

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