Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf9b62bf719b573…

MALICIOUS

PDF

43.3 KB Created: 2021-05-10 21:04:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fe9352d6ec551221cd9e008d5df79a68 SHA-1: c5cbc861602a501b24f9158644f006d6aa39451e SHA-256: ddf9b62bf719b573fed1edb02a7aff235c802bb0f57da47762a140481404d693
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a fake CAPTCHA lure to trick users into clicking malicious links, disguised as game hacks or free generators. The primary link directs to a known malicious redirector infrastructure. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt, likely intended to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/431946152/how-do-you-get-free-roebucks-game-hack In PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/hack-coin-pro-coin-master_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_003_off000048de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DE 26584 bytes
SHA-256: 8f87120bd4f7d078576c0bf2a9a0863b895260db19081c9ed60a3a16a36b30e6
font_01_sfnt_off000085f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F4 18572 bytes
SHA-256: 2ad3879de19ea59e0756335b6843f31f95ade4521f96ee42130de8f0f36df72d

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