Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa19a9ea4c6141cb…

MALICIOUS

PDF

34.6 KB Created: 2021-06-21 13:28:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 755b5a0ce9502e5c71f73b6bac7e44fc SHA-1: 66c7c2b40aa43f3af8fd6a2b3d174ff62f2b9c21 SHA-256: fa19a9ea4c6141cb86c0505ce9742b318cb98bc1f94c2964ecdd9f75a6f96905
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 0.9980

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 http://netcdn.co/app/431946152/how-so-i-get-free-robux-game-hack PDF link annotation
    • https://www.misceren.com/home/misceren/public_html/upload/files/free-printable-coloring-pages-roblox_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/cheat-engine-kill-al-script-roblox_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/roblox-kill-hack-download_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/hack-roblox-online-no-survey_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/cool-avatars-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/cute-free-roblox-clothes_GM431946152.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_off0000304d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304D 22464 bytes
SHA-256: 8685d5320cf37a10e5664dd88f756d45f1a71a1e3a64dff0fd341c4261510e4c
font_01_sfnt_off00006269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6269 18984 bytes
SHA-256: 5475e14aa618a15cd66f36c310667355c263806586e5d332a6b468e725ba369e

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