Malicious PDF — malware analysis report

Static analysis result for SHA-256 523cd5043652d5b1…

MALICIOUS

PDF

45.6 KB Created: 2021-05-12 23:39:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dbc41a2c00b5b95a3ce5c1b7628d39b2 SHA-1: 42344f56a799c4546df3aa0e608af1463b4a4c40 SHA-256: 523cd5043652d5b1f8d4e85b6f7f931724f69c15bf1ba6bacffc07e8af4286b0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • 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.xyz/app/406889139/coins-master-hack-game-hack PDF link annotation
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FB 27084 bytes
SHA-256: 9da38b400a38afb709fae878774d1272a1f4e2eab82ebc81819fda331765ba81
font_01_sfnt_off00008733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8733 3004 bytes
SHA-256: 7aa631124d5de0e83f25f65e36b1e0818592cc9c6a30b30c02bb6738b635be8e
font_02_sfnt_off00009182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9182 17716 bytes
SHA-256: d488acdeac9c101f8c7dc9d2f61752a744fbde28c1faa2289984f0ec4d4cc76f

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