Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac41239d97987a57…

MALICIOUS

PDF

45.9 KB Created: 2021-06-04 01:17:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 70803ebd4122ef77c5c53b6ec2f3cde5 SHA-1: 05ca8603a7919f97c4a34e9a673cfc6ace501f86 SHA-256: ac41239d97987a57b8bc3eaa95df3a9229e41436bd7b7884eb5173f81b0f142b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA to trick users into downloading an application from the URL https://netcdn.online/app/835599320/get-free-tiktok-followers-app-game-hack. The presence of multiple PDF URIs pointing to similar download lures suggests a consistent phishing or scamming campaign. While no scripts were directly extracted, the PDF structure and embedded URIs indicate a malicious intent to deliver a payload or lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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
  • 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.online/app/835599320/get-free-tiktok-followers-app-game-hack PDF link annotation
    • http://elib.acls-indonesia.com/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/pokmon-go-free-download-apk_GM1094591345.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-hack-android_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/pubg-uc-price-in-uae_GM1330123889.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-mad-city-hack-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/reddit-coin-master-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_off00005289.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5289 28628 bytes
SHA-256: 1aca8cd6dfa22124dfa76e193b4c62267a25ddf48e9c26b029a1c0f9d3db9f77
font_01_sfnt_off00009231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9231 17872 bytes
SHA-256: 644cd3af33948e3b1c35e2246af95d37fac1a8536ee48a5af93e420b13df8beb

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