Malicious PDF — malware analysis report

Static analysis result for SHA-256 966ac387e689859c…

MALICIOUS

PDF

49.1 KB Created: 2021-06-11 10:23:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6e11b78393bfbdb4ac3eed4455fe7410 SHA-1: be944f9cb884ebd49724779b6463423154f759eb SHA-256: 966ac387e689859c264db8c0391b882adcbb151ea500353392d53fd68a84744b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a lure for game hacks. The document body, though heavily obfuscated, contains a URL that aligns with the heuristic findings. The primary attack pattern involves directing users to a malicious site under the guise of providing game-related benefits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • 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.
  • 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.tw/app/431946152/como-desbloquear-un-cuenta-hackeada-de-roblox-game-hack In PDF document text
    • http://medinup.pt/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-do-you-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/why-tiktok-free-view-bot_GM835599320.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/how-2-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/copychat-hack-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-hack-tix-and-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000500d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500D 26000 bytes
SHA-256: 279e1d3d8b95d95236abd94ccbb269adb8a9f3313c9a7131f68ff1758eaddfe3
font_01_sfnt_off00008cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB5 3988 bytes
SHA-256: 1ba32a5139c6de22584ee0f72d573162a644f7c4206fa3a2a8dea775e8e2a087
font_02_sfnt_off000099d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D1 19384 bytes
SHA-256: 986c50cd0d323fb1222fa6fecd2b70535f17667defd9dfccf7fd30e517c5576d

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