Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffdccfb5de4dffcf…

MALICIOUS

PDF

54.4 KB Created: 2021-06-09 00:36:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2a53e365520a013f892b965268fcb47b SHA-1: a9dd9e11dbdd00a98749039b8052cae2905e26f8 SHA-256: ffdccfb5de4dffcffe6376df8912db64f8f450ead8d450dadaad5d96d781435c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including one pointing to 'cheating-prank-in-roblox-game-hack', indicating a lure for potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is part of a link farm, likely designed to drive traffic to exploit or phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aiming to trick users into visiting malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/cheating-prank-in-roblox-game-hack PDF link annotation
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/obby-gives-you-free-robux-no-password-required-2021-link_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-cheat-engine-hack_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_off00005805.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5805 40548 bytes
SHA-256: 50af3cf74ecb722ed9feb7aafed1a04cbb4efc663308a20839902d1ac56f0be5
font_01_sfnt_off0000b0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E1 19012 bytes
SHA-256: e602f105d168a954ddb6e8df927702d6ed88dbbcccc9d5e667be94d2187d28a3

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