Malicious PDF — malware analysis report

Static analysis result for SHA-256 0443cc1b8d38f609…

MALICIOUS

PDF

32.6 KB Created: 2021-06-26 15:26:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f6c9623a3444c1662bac166e86c4adaf SHA-1: 0e1eaa85ec4c2c1e73a227ccf7f5b1c3e9c725b8 SHA-256: 0443cc1b8d38f609abec5c26131829ceb0eeb991a6108b7c9843904ebde2f70c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as a 'free Robux generator'. The document body and embedded URLs strongly suggest a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. The ML classifier also flagged this PDF as malicious, increasing confidence in the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-generator-robuxian-game-hack In PDF document text
    • http://perpus.polbitrada.ac.id/repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/best-girl-outfits-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-printable-coloring-pages-of-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-free-gameplay-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-tool-download-works_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-hack-client-we-are-devs_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-how-to-hack-people-39_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_off00002a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A02 22004 bytes
SHA-256: 4bc6e86611ce3730c5929dbd14bca6740d4b49db49bdcb19ebb4cae9b3b139ef
font_01_sfnt_off00005abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABD 18940 bytes
SHA-256: 7d94f920091d6669996f82bd4199ab4afdecc3bdd3c810fbe881b06e5d688da6

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