Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c501f4a5360bcb…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 10:27:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a0f4c44fd20495614dc591f94d05d001 SHA-1: 1720b86d93e45b90996863b9d3006bbbb032a4cc SHA-256: d5c501f4a5360bcba65a6f233662a291e977a2e2fc97cf2141f9f9f18047a4a4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's designed to redirect users to external websites, specifically promoting 'game hacks' and 'free currency' lures. The document body and extracted URLs reinforce this, pointing towards a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded links suggest a malicious workflow aimed at user deception.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/microsoft-robux-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-btools-and-speed-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-the-pizzeria-rp-remastered-fazcoins-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-accpunt-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-arc-of-the-elements-phoenix-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/is-pokemon-go-free-on-ipad_GM1094591345.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-hack-on-roblox-in-3-simple-steps-animated_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-admin-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robloxyahoo-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-infinite-jump-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-100-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-how-to-get-tge-free-trial-trial-bc_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_off000034de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34DE 22128 bytes
SHA-256: 5aff637d8549ee9f1b5697b6c424436d6290a1e737af6ba374daaf1a8001414d
font_01_sfnt_off00006605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 18972 bytes
SHA-256: d6a3ce79aa63d991b5b8cdb75d9c3988d6b2b0452395129ae24b92a3de9ee2ba

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