Malicious PDF — malware analysis report

Static analysis result for SHA-256 45746c14350d5fe7…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 12:10:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d7d62c47cd1a7770b86de107f3e0f208 SHA-1: 6536136653f8f57889bf79dabbdfb69e27a865b7 SHA-256: 45746c14350d5fe7a17d77654ec07ba4e6c9c56f1589823959444eadd887aa1b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9832

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.online/app/479516143/toolbox-for-mcpe-game-hack PDF link annotation
    • https://www.insol-europe.org/uploads/files/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/what-is-the-fastest-way-to-get-xp-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/free-spin-coin_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
font_00_sfnt_off0000554d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x554D 31256 bytes
SHA-256: d59b25ad2492a33b59cb4e5c850a78a095890d98bb79af37f7d04be0d2029aff
font_01_sfnt_off00009458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9458 17876 bytes
SHA-256: eda4d52e79abf7a1b879143452569305f904f3468e032f0c3d3d7cbd308c3d80