Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d74b57124f546dc…

MALICIOUS

PDF

43.9 KB Created: 2021-05-16 02:35:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4504c13d90daded15da0c7d0e3b31542 SHA-1: c972a02470725e6ed0415cebcab22d76c4bb941f SHA-256: 6d74b57124f546dc753fad78821dfd62b5c4221ec4fc49a4368becb4274bbe0c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as game-related generators and hacks, such as 'free-minecraft-skins-ps4-game-hack'. These links likely redirect to malicious websites or initiate downloads. The presence of numerous URLs pointing to similar lure content suggests a phishing or scam campaign. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/479516143/free-minecraft-skins-ps4-game-hack PDF link annotation
    • http://zercalo.org/images/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/claim-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-minecraft-for-free-on-android_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_off000047dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DD 24908 bytes
SHA-256: 4fb488945730b65aacca0205b8714ad0f1dc3d5fcca2227d5492e73d7125b597
font_01_sfnt_off0000804e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804E 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off000089ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EE 17956 bytes
SHA-256: f16184d131abb73dd8cdf0449b410f67b95b3645fab407bf2b051681382e3c16

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