Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c494f365af8012a…

MALICIOUS

PDF

45.4 KB Created: 2021-05-30 08:21:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 99fd150b353178944f5fe63d4f066efd SHA-1: 0d12e25e388525dcfa25dff9583e32c052e59d63 SHA-256: 4c494f365af8012a77e06720a9f67f30d1ecec1d8bc37a21b63c9bc5e7bd44ed
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with 'free generator' or 'download' content, suggesting it's part of a phishing campaign. The embedded links likely lead to the download of further malicious content or redirect to phishing sites. While no scripts were explicitly extracted, the nature of the lures and the presence of malicious URLs strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9580

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 invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/479516143/how-to-get-minecraft-realms-for-free-game-hack In PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-free-spins-2021_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_off0000551f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x551F 25696 bytes
SHA-256: eec0db16034ba4e4ad840ec09c0c3e9431825da5a7615288f258564cc47e1d22
font_01_sfnt_off00008f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 18208 bytes
SHA-256: e7f5766237207d24130a790e1d2d61f15d85f871af5599da5b7787abafcff996