Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b22aa03039e3afa…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 05:38:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 590a85bece410d21ec9885a05fca6f5c SHA-1: 0aed2e8a2dcd725761047b428e930843d4d89ace SHA-256: 8b22aa03039e3afa4e4d732dd9c4fd6aa425b868a494e47b68b91cc79fc0e404
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, masquerading as a 'free generator / game hack'. The document body and heuristics indicate a lure for free Robux or game hacks, aiming to trick users into visiting a malicious URL. No scripts were extracted from this sample, but the presence of malicious redirector links is a strong indicator of a phishing or scam attempt.

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.tw/app/431946152/how-to-get-free-robux-on-ipad-game-hack In PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hack-wh_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hack-script-infinite-health_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/is-tiktok-free-on-iphone_GM835599320.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-costume-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-codes-september-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-republic-base-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/is-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-robux-hack-online-generator-tool-no-download_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
font_00_sfnt_off000030e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E9 22028 bytes
SHA-256: e90551eda8a23a92c03ebaeef0a109ab78fa593fb0cb3951a818c4014527191f
font_01_sfnt_off00006177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 19336 bytes
SHA-256: 6d1966dedbfa40cd6f3b86a0165a8efd1ff1225966bd53f71ae3281b1191d4bc

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